Updates wood stair sprite (#2889)

## About The Pull Request

![606b4c254b5ef69e78735a06a9b43dad-1](https://github.com/shiptest-ss13/Shiptest/assets/118859017/bd04272f-c8c1-48b3-b027-00e5c922aa33)
Wood stairs are currently recolored plasteel stairs, which look bad.
This PR overlays @Imaginos16's wood floor sprites on wood stairs, making
them more in-line with our current tileset. This PR also adds subtypes
for different types of wood stairs.

## Why It's Good For The Game
Stair good.

## Changelog

🆑
tweak: Wood stair sprites have been updated to be more in-line with wood
floors.
/🆑

_maps/RandomRuins/BeachRuins/beach_knights_rest.dmm

@@ -35,7 +35,7 @@
 /area/overmap_encounter/planetoid/beachplanet/explored)
 "dF" = (
 /obj/structure/mineral_door/iron,
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	dir = 4
 	},
 /area/ruin/beachplanet/knight)
@@ -940,7 +940,7 @@
 /area/overmap_encounter/planetoid/beachplanet/explored)
 "ZS" = (
 /obj/structure/mineral_door/iron,
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	dir = 8
 	},
 /area/ruin/beachplanet/knight)

_maps/RandomRuins/JungleRuins/jungle_bombed_starport.dmm

@@ -457,7 +457,7 @@
 /obj/machinery/atmospherics/pipe/simple/orange/hidden{
 	dir = 4
 	},
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	dir = 4
 	},
 /area/overmap_encounter/planetoid/jungle/explored)
@@ -509,7 +509,7 @@
 /area/overmap_encounter/planetoid/jungle/explored)
 "dI" = (
 /obj/machinery/atmospherics/pipe/simple/orange/hidden,
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	dir = 1
 	},
 /area/overmap_encounter/planetoid/jungle/explored)
@@ -1132,7 +1132,7 @@
 "hZ" = (
 /obj/structure/spider/stickyweb,
 /obj/machinery/atmospherics/pipe/simple/orange/hidden,
-/turf/open/floor/plasteel/stairs/medium,
+/turf/open/floor/plasteel/stairs/mid,
 /area/overmap_encounter/planetoid/jungle/explored)
 "ib" = (
 /obj/item/stack/sheet/metal,
@@ -1759,7 +1759,7 @@
 /obj/machinery/atmospherics/pipe/simple/orange/hidden{
 	dir = 4
 	},
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	dir = 8
 	},
 /area/overmap_encounter/planetoid/jungle/explored)
@@ -2732,7 +2732,7 @@
 /area/overmap_encounter/planetoid/jungle/explored)
 "te" = (
 /obj/effect/decal/cleanable/dirt/dust,
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	dir = 4
 	},
 /area/overmap_encounter/planetoid/jungle/explored)
@@ -3029,7 +3029,7 @@
 /area/overmap_encounter/planetoid/jungle/explored)
 "vd" = (
 /obj/machinery/atmospherics/pipe/simple/orange/hidden,
-/turf/open/floor/plasteel/stairs/medium,
+/turf/open/floor/plasteel/stairs/mid,
 /area/overmap_encounter/planetoid/jungle/explored)
 "ve" = (
 /obj/structure/railing{
@@ -3478,7 +3478,7 @@
 /obj/structure/cable{
 	icon_state = "1-2"
 	},
-/turf/open/floor/plasteel/stairs/medium,
+/turf/open/floor/plasteel/stairs/mid,
 /area/overmap_encounter/planetoid/jungle/explored)
 "xT" = (
 /obj/structure/table/reinforced,

_maps/RandomRuins/JungleRuins/jungle_interceptor.dmm

@@ -1642,7 +1642,7 @@
 /turf/open/floor/plating,
 /area/overmap_encounter/planetoid/jungle/explored)
 "nZ" = (
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	dir = 1
 	},
 /area/ruin/jungle/interceptor/forehall)
@@ -6138,7 +6138,7 @@
 "YQ" = (
 /obj/machinery/atmospherics/pipe/simple/supply/hidden/layer2,
 /obj/machinery/atmospherics/pipe/simple/scrubbers/hidden/layer4,
-/turf/open/floor/plasteel/stairs/medium,
+/turf/open/floor/plasteel/stairs/mid,
 /area/ruin/jungle/interceptor/afthall)
 "YT" = (
 /obj/structure/catwalk/over/plated_catwalk/dark,

_maps/outpost/hangar/nt_asteroid_20x20.dmm

@@ -620,7 +620,7 @@
 	},
 /area/hangar)
 "pW" = (
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	planetary_atmos = 1
 	},
 /area/hangar)

_maps/shuttles/inteq/inteq_valor.dmm

@@ -4298,7 +4298,7 @@
 /obj/structure/cable{
 	icon_state = "4-8"
 	},
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	dir = 8
 	},
 /area/ship/cargo)

_maps/shuttles/minutemen/minutemen_vela.dmm

@@ -1468,7 +1468,7 @@
 /turf/open/floor/carpet/nanoweave/purple,
 /area/ship/science)
 "jh" = (
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	dir = 1
 	},
 /area/ship/hallway/central)
@@ -6643,7 +6643,7 @@
 /turf/open/floor/circuit/green,
 /area/ship/science/ai_chamber)
 "KC" = (
-/turf/open/floor/plasteel/stairs/medium,
+/turf/open/floor/plasteel/stairs/mid,
 /area/ship/hallway/central)
 "KE" = (
 /obj/machinery/firealarm/directional/south,

_maps/shuttles/nanotrasen/nanotrasen_osprey.dmm

@@ -3998,7 +3998,7 @@
 /obj/structure/cable{
 	icon_state = "4-8"
 	},
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	dir = 4
 	},
 /area/ship/cargo)

_maps/shuttles/solgov/solgov_inkwell.dmm

@@ -1716,7 +1716,7 @@
 	pixel_y = 0;
 	pixel_x = -26
 	},
-/turf/open/floor/plasteel/stairs/wood{
+/turf/open/floor/plasteel/stairs/wood/left{
 	dir = 1
 	},
 /area/ship/bridge)
@@ -2435,7 +2435,7 @@
 /area/ship/crew/canteen/kitchen)
 "qe" = (
 /obj/effect/decal/cleanable/dirt/dust,
-/turf/open/floor/plasteel/stairs/wood{
+/turf/open/floor/plasteel/stairs/wood/right{
 	dir = 1
 	},
 /area/ship/bridge)
@@ -3704,9 +3704,8 @@
 	dir = 8
 	},
 /obj/effect/decal/cleanable/dirt/dust,
-/turf/open/floor/plasteel/stairs/wood{
-	dir = 8;
-	color = "#D5A66E"
+/turf/open/floor/plasteel/stairs/wood/birch{
+	dir = 8
 	},
 /area/ship/crew/dorm/dormthree)
 "xF" = (
@@ -6301,7 +6300,7 @@
 /obj/structure/railing/wood{
 	dir = 4
 	},
-/turf/open/floor/plasteel/stairs/wood,
+/turf/open/floor/plasteel/stairs/wood/right,
 /area/ship/bridge)
 "Qt" = (
 /obj/machinery/power/terminal{
@@ -6462,7 +6461,7 @@
 	dir = 1
 	},
 /obj/effect/decal/cleanable/dirt/dust,
-/turf/open/floor/plasteel/stairs/wood,
+/turf/open/floor/plasteel/stairs/wood/left,
 /area/ship/bridge)
 "Rh" = (
 /obj/effect/turf_decal/techfloor,
@@ -6892,9 +6891,8 @@
 	dir = 8
 	},
 /obj/effect/decal/cleanable/dirt/dust,
-/turf/open/floor/plasteel/stairs/wood{
-	dir = 8;
-	color = "#543C30"
+/turf/open/floor/plasteel/stairs/wood/walnut{
+	dir = 8
 	},
 /area/ship/crew/dorm/dormtwo)
 "TV" = (

_maps/shuttles/syndicate/syndicate_litieguai.dmm

@@ -2291,7 +2291,7 @@
 /obj/structure/cable{
 	icon_state = "2-9"
 	},
-/turf/open/floor/plasteel/stairs/medium{
+/turf/open/floor/plasteel/stairs/mid{
 	dir = 1
 	},
 /area/ship/storage/eva)

code/game/turfs/open/floor/plasteel_floor.dm

@@ -157,7 +157,6 @@
 /turf/open/floor/plasteel/cult/airless
 	initial_gas_mix = AIRLESS_ATMOS
 
-
 /turf/open/floor/plasteel/stairs //considering removal
 	icon = 'icons/turf/floors.dmi'
 	icon_state = "stairs"
@@ -169,7 +168,7 @@
 	icon_state = "stairs-l"
 	base_icon_state = "stairs-l"
 
-/turf/open/floor/plasteel/stairs/medium
+/turf/open/floor/plasteel/stairs/mid
 	icon_state = "stairs-m"
 	base_icon_state = "stairs-m"
 
@@ -182,9 +181,128 @@
 	base_icon_state = "stairs-old"
 
 /turf/open/floor/plasteel/stairs/wood
-	color = "#A47449"
-	barefootstep = "wood"
-	footstep = "wood"
+	color = "#5B3E1D"
+	icon_state = "stairs-wood"
+	base_icon_state = "stairs-wood"
+	barefootstep = FOOTSTEP_WOOD_BAREFOOT
+	footstep = FOOTSTEP_WOOD_CLAW
+
+/turf/open/floor/plasteel/stairs/wood/left
+	icon_state = "stairs-wood-l"
+	base_icon_state = "stairs-wood-l"
+
+/turf/open/floor/plasteel/stairs/wood/mid
+	icon_state = "stairs-wood-m"
+	base_icon_state = "stairs-wood-m"
+
+/turf/open/floor/plasteel/stairs/wood/right
+	icon_state = "stairs-wood-r"
+	base_icon_state = "stairs-wood-r"
+
+/turf/open/floor/plasteel/stairs/wood/mahogany
+	color = WOOD_COLOR_RICH
+
+/turf/open/floor/plasteel/stairs/wood/mahogany/left
+	icon_state = "stairs-wood-l"
+	base_icon_state = "stairs-wood-l"
+
+/turf/open/floor/plasteel/stairs/wood/mahogany/mid
+	icon_state = "stairs-wood-m"
+	base_icon_state = "stairs-wood-m"
+
+/turf/open/floor/plasteel/stairs/wood/mahogany/right
+	icon_state = "stairs-wood-r"
+	base_icon_state = "stairs-wood-r"
+
+/turf/open/floor/plasteel/stairs/wood/maple
+	color = WOOD_COLOR_PALE
+
+/turf/open/floor/plasteel/stairs/wood/maple/left
+	icon_state = "stairs-wood-l"
+	base_icon_state = "stairs-wood-l"
+
+/turf/open/floor/plasteel/stairs/wood/maple/mid
+	icon_state = "stairs-wood-m"
+	base_icon_state = "stairs-wood-m"
+
+/turf/open/floor/plasteel/stairs/wood/maple/right
+	icon_state = "stairs-wood-r"
+	base_icon_state = "stairs-wood-r"
+
+/turf/open/floor/plasteel/stairs/wood/ebony
+	color = WOOD_COLOR_BLACK
+
+/turf/open/floor/plasteel/stairs/wood/ebony/left
+	icon_state = "stairs-wood-l"
+	base_icon_state = "stairs-wood-l"
+
+/turf/open/floor/plasteel/stairs/wood/ebony/mid
+	icon_state = "stairs-wood-m"
+	base_icon_state = "stairs-wood-m"
+
+/turf/open/floor/plasteel/stairs/wood/ebony/right
+	icon_state = "stairs-wood-r"
+	base_icon_state = "stairs-wood-r"
+
+/turf/open/floor/plasteel/stairs/wood/walnut
+	color = WOOD_COLOR_CHOCOLATE
+
+/turf/open/floor/plasteel/stairs/wood/walnut/left
+	icon_state = "stairs-wood-l"
+	base_icon_state = "stairs-wood-l"
+
+/turf/open/floor/plasteel/stairs/wood/walnut/mid
+	icon_state = "stairs-wood-m"
+	base_icon_state = "stairs-wood-m"
+
+/turf/open/floor/plasteel/stairs/wood/walnut/right
+	icon_state = "stairs-wood-r"
+	base_icon_state = "stairs-wood-r"
+
+/turf/open/floor/plasteel/stairs/wood/bamboo
+	color = WOOD_COLOR_PALE2
+
+/turf/open/floor/plasteel/stairs/wood/bamboo/left
+	icon_state = "stairs-wood-l"
+	base_icon_state = "stairs-wood-l"
+
+/turf/open/floor/plasteel/stairs/wood/bamboo/mid
+	icon_state = "stairs-wood-m"
+	base_icon_state = "stairs-wood-m"
+
+/turf/open/floor/plasteel/stairs/wood/bamboo/right
+	icon_state = "stairs-wood-r"
+	base_icon_state = "stairs-wood-r"
+
+/turf/open/floor/plasteel/stairs/wood/birch
+	color = WOOD_COLOR_PALE3
+
+/turf/open/floor/plasteel/stairs/wood/birch/left
+	icon_state = "stairs-wood-l"
+	base_icon_state = "stairs-wood-l"
+
+/turf/open/floor/plasteel/stairs/wood/birch/mid
+	icon_state = "stairs-wood-m"
+	base_icon_state = "stairs-wood-m"
+
+/turf/open/floor/plasteel/stairs/wood/birch/right
+	icon_state = "stairs-wood-r"
+	base_icon_state = "stairs-wood-r"
+
+/turf/open/floor/plasteel/stairs/wood/yew
+	color = WOOD_COLOR_YELLOW
+
+/turf/open/floor/plasteel/stairs/wood/yew/left
+	icon_state = "stairs-wood-l"
+	base_icon_state = "stairs-wood-l"
+
+/turf/open/floor/plasteel/stairs/wood/yew/mid
+	icon_state = "stairs-wood-m"
+	base_icon_state = "stairs-wood-m"
+
+/turf/open/floor/plasteel/stairs/wood/yew/right
+	icon_state = "stairs-wood-r"
+	base_icon_state = "stairs-wood-r"
 
 /turf/open/floor/plasteel/rockvault
 	icon_state = "rockvault"