Assisted organ sprites, and assisted brains (#19087)

This PR adds several sprites for assisted organs, which previously
lacked any sprites at all. In addition, this adds an assisted brain,
which is now available to pick in character creation. Long-term, I'd
like to look into adding assisted implants into the medical gameplay
loop, but for now these are character-creation only. "Mechanical"
prosthetic brains are not possible, and have been excised entirely.

### Asset Licenses
The following assets that **have not** been created by myself are
included in this PR:

| Path | Original Author | License |
| --- | --- | --- |
| icons/obj/organs/organs.dmi | Mechoid (Polaris) | CC-BY-SA |

---------

Co-authored-by: Cody Brittain <[email protected]>

code/modules/client/preference_setup/general/03_body.dm

@@ -270,6 +270,8 @@ var/global/list/valid_bloodtypes = list("A+", "A-", "B+", "B-", "AB+", "AB-", "O
 					out += "<li>- Surgically Altered [capitalize_first_letters(parse_zone(organ_name))]</li>"
 				if(BP_EYES)
 					out += "<li>- Retinal Overlayed [capitalize_first_letters(parse_zone(organ_name))]</li>"
+				if(BP_BRAIN)
+					out += "<li>- Positronic-Implanted [capitalize_first_letters(parse_zone(organ_name))]</li>"
 				else
 					out += "<li>- Mechanically Assisted [capitalize_first_letters(parse_zone(organ_name))]</li>"
 		else if(status == ORGAN_PREF_REMOVED)

code/modules/mob/living/carbon/human/species/species.dm

@@ -294,7 +294,7 @@
 	var/bodyfall_sound = /singleton/sound_category/bodyfall_sound //default, can be used for species specific falling sounds
 	var/footsound = /singleton/sound_category/blank_footsteps //same as above but for footsteps without shoes
 
-	var/list/alterable_internal_organs = list(BP_HEART, BP_EYES, BP_LUNGS, BP_LIVER, BP_KIDNEYS, BP_STOMACH, BP_APPENDIX) //what internal organs can be changed in character setup
+	var/list/alterable_internal_organs = list(BP_HEART, BP_EYES, BP_LUNGS, BP_LIVER, BP_BRAIN, BP_KIDNEYS, BP_STOMACH, BP_APPENDIX) //what internal organs can be changed in character setup
 	var/list/possible_external_organs_modifications = list("Normal","Amputated","Prosthesis")
 	/// These are the prefixes of the icon states in talk.dmi.
 	var/list/possible_speech_bubble_types = list("default")

code/modules/organs/internal/_internal.dm

@@ -91,6 +91,10 @@
 
 			robotize_type = company
 
+/obj/item/organ/internal/mechassist()
+	..()
+	icon_state = "[initial(icon_state)]-assisted"
+
 /obj/item/organ/internal/proc/getToxLoss()
 	if(BP_IS_ROBOTIC(src))
 		return damage * 0.5

code/modules/organs/internal/brain.dm

@@ -3,6 +3,7 @@
 	desc = "A piece of juicy meat found in a person's head."
 	organ_tag = BP_BRAIN
 	parent_organ = BP_HEAD
+	possible_modifications = list ("Normal","Assisted")
 	vital = TRUE
 	icon_state = "brain"
 	force = 1

code/modules/organs/organ.dm

@@ -389,6 +389,8 @@ INITIALIZE_IMMEDIATE(/obj/item/organ)
 			name = "pacemaker-assisted [initial(name)]"
 		if(BP_EYES)
 			name = "retinal overlayed [initial(name)]"
+		if(BP_BRAIN)
+			name = "positronic-implanted [initial(name)]"
 		else
 			name = "mechanically assisted [initial(name)]"
 	icon_state = initial(icon_state)
@@ -401,7 +403,7 @@ INITIALIZE_IMMEDIATE(/obj/item/organ)
 
 	var/organ_fragility = 0.5
 
-	if((status & ORGAN_ROBOT))	//fully robotic organs take the normal emp damage, assited ones only suffer half of it
+	if((status & ORGAN_ROBOT))	//fully robotic organs take the normal emp damage, assisted ones only suffer half of it
 		organ_fragility = 1
 
 	switch (severity)

html/changelogs/GeneralCamo - Assisted Organs.yml

@@ -0,0 +1,59 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes:
+#   bugfix
+#     - (fixes bugs)
+#   wip
+#     - (work in progress)
+#   qol
+#     - (quality of life)
+#   soundadd
+#     - (adds a sound)
+#   sounddel
+#     - (removes a sound)
+#   rscadd
+#     - (adds a feature)
+#   rscdel
+#     - (removes a feature)
+#   imageadd
+#     - (adds an image or sprite)
+#   imagedel
+#     - (removes an image or sprite)
+#   spellcheck
+#     - (fixes spelling or grammar)
+#   experiment
+#     - (experimental change)
+#   balance
+#     - (balance changes)
+#   code_imp
+#     - (misc internal code change)
+#   refactor
+#     - (refactors code)
+#   config
+#     - (makes a change to the config files)
+#   admin
+#     - (makes changes to administrator tools)
+#   server
+#     - (miscellaneous changes to server)
+#################################
+
+# Your name.
+author: GeneralCamo
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, this gets changed to [] after reading.  Just remove the brackets when you add new shit.
+# Please surround your changes in  double quotes ("). It works without them, but if you use certain characters it screws up compiling. The quotes will not show up in the changelog.
+changes:
+  - imageadd: "Added sprites for assisted organs."
+  - rscadd: "Added assisted brains."