Finishes The Ballistic Rework (#2176)

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## About The Pull Request
Finishes #1493 
From the previous PR:
HOW CARTRIDGES ARE BALANCED:

Lower-velocity cartridges like pistol and shotgun rounds now have a
default penalty to AP power. As velocity increases, AP increases
substantially and damage increases slightly. Hollowpoint and AP round
variants modify that base AP further, with AP handgun bullets having
lower AP than AP rifle bullets.

    Shotgun & Handgun: -20 AP
    PDW: 0 AP
    Assault Rifle, LMG: 20 AP
    Rifle: 40 AP
    Shotgun: -35 AP pellets, -10 AP slugs

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## Why It's Good For The Game
Also from the previous PR:
Ballistic cartridges should be distinguished by traits other than just
raw damage. By using AP to distinguish ballistic weapon classes, they
now have more distinct use cases. Additionally, low-AP weapons like
handguns and shotguns remain useful against simple mobs but drop off
significantly in effectiveness against well-armored players, meaning
there's more reason to seek out specialized ammo types or higher-caliber
weapons than just damage output. The lower raw damage of rifle-caliber
weapons also means they are a much more viable choice for roundstart
placement in ships, leading to more loadout diversity.
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## Changelog

:cl: Apogee, Erika, Imaginos
add: transferring bullets from magazine to magazine now has a do_after
and loops.
add: Ammo magazines are now purchasable at the outpost
add: P16s, SVG-whatevers, Bolt-Action Rifles, and .357 revolvers are now
available for purchase at the outpost
del: Removed paywall and clown firing pins from purchase.
balance: AP Values have been tweaked across the board (On guns at
least), smaller cartridges tend to penetrate less, while larger ones
penetrate more.
imageadd: New bullet sprites (I believe they're apogee's), and new ammo
box sprites by Imaginos
/:cl:

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---------

Co-authored-by: Apogee <[email protected]>
Co-authored-by: Imaginos16 <[email protected]>

_maps/shuttles/shiptest/independent_dwayne.dmm

@@ -1654,10 +1654,9 @@
 /obj/item/kinetic_crusher,
 /obj/effect/turf_decal/box,
 /obj/item/vending_refill/mining_equipment,
-/obj/item/ammo_box/c38_box/hunting,
-/obj/item/ammo_box/c38_box/hunting,
 /obj/item/ammo_box/c38_box,
-/obj/item/disk/design_disk/ammo_38_hunting,
+/obj/item/ammo_box/c38_box,
+/obj/item/ammo_box/c38_box,
 /obj/machinery/atmospherics/components/unary/vent_pump/on/layer2,
 /obj/machinery/atmospherics/pipe/simple/scrubbers/hidden/layer4{
 	dir = 9