Splits mutant_bodyparts.dmi into several subfiles. (#71408)

## About The Pull Request

Splits the `mutant_bodyparts.dmi` file up, as was suggested, but not
implemented, in #69302.

The following new files were created in the `icons\mob\species` folder,
containing the listed sprites:

- `lizard\lizard_misc.dmi`: Snouts, horns, frills, and body markings.
Anything I didn't feel needed an entire file to itself.
- `lizard\lizard_spines.dmi`: Lizard spines, both animated and not.
- `lizard\lizard_tails.dmi`: Lizard tails, both animated and not.
- `human\cat_features.dmi`: Felinid ears and tails.
- `monkey\monkey_tail.dmi`: The monkey tail.
- `mush_cap.dmi`: The lone mushperson cap, so easily forgotten.

Additionally, I moved `wings.dmi` from `mob\clothing` to `mob\species`.
I'm not sure what it was doing there.
## Why It's Good For The Game

`mutant_bodyparts.dmi` was something of a mess, with parts from four
different species thrown together haphazardly. It probably made sense in
earlier days when "mutant humans" were few and far between, but
splitting it up makes it more intuitive to find these sprites, and
brings it in line with other species - namely, moths. It also means that
any future sprites of these types added will not bloat an oversized file
even more.

Moving the wings file to the species folder just makes sense, because
wings are not a type of clothing.
## Changelog
🆑
refactor: Removed mutant_bodyparts.dmi and distributed its sprites in a
more sensible and granular manner.
/🆑

code/modules/client/preferences/species_features/lizard.dm

@@ -7,7 +7,7 @@
 	lizard.Blend(eyes, ICON_OVERLAY)
 
 	if (include_snout)
-		lizard.Blend(icon('icons/mob/species/mutant_bodyparts.dmi', "m_snout_round_ADJ", EAST), ICON_OVERLAY)
+		lizard.Blend(icon('icons/mob/species/lizard/lizard_misc.dmi', "m_snout_round_ADJ", EAST), ICON_OVERLAY)
 
 	for (var/name in sprite_accessories)
 		var/datum/sprite_accessory/sprite_accessory = sprite_accessories[name]
@@ -46,7 +46,7 @@
 
 		if (sprite_accessory.icon_state != "none")
 			var/icon/body_markings_icon = icon(
-				'icons/mob/species/mutant_bodyparts.dmi',
+				'icons/mob/species/lizard/lizard_misc.dmi',
 				"m_body_markings_[sprite_accessory.icon_state]_ADJ",
 			)
 

code/modules/mob/dead/new_player/sprite_accessories.dm

@@ -1688,7 +1688,7 @@
 /////////////////////////////
 
 /datum/sprite_accessory/body_markings
-	icon = 'icons/mob/species/mutant_bodyparts.dmi'
+	icon = 'icons/mob/species/lizard/lizard_misc.dmi'
 
 /datum/sprite_accessory/body_markings/none
 	name = "None"
@@ -1710,9 +1710,11 @@
 	gender_specific = 1
 
 /datum/sprite_accessory/tails
-	icon = 'icons/mob/species/mutant_bodyparts.dmi'
 	em_block = TRUE
 
+/datum/sprite_accessory/tails/lizard
+	icon = 'icons/mob/species/lizard/lizard_tails.dmi'
+
 /datum/sprite_accessory/tails/lizard/smooth
 	name = "Smooth"
 	icon_state = "smooth"
@@ -1731,11 +1733,13 @@
 
 /datum/sprite_accessory/tails/human/cat
 	name = "Cat"
+	icon = 'icons/mob/species/human/cat_features.dmi'
 	icon_state = "cat"
 	color_src = HAIR
 
 /datum/sprite_accessory/tails/monkey
 	name = "Monkey"
+	icon = 'icons/mob/species/monkey/monkey_tail.dmi'
 	icon_state = "monkey"
 	color_src = FALSE
 
@@ -1784,7 +1788,7 @@
 	icon_state = "hibiscus"
 
 /datum/sprite_accessory/snouts
-	icon = 'icons/mob/species/mutant_bodyparts.dmi'
+	icon = 'icons/mob/species/lizard/lizard_misc.dmi'
 	em_block = TRUE
 
 /datum/sprite_accessory/snouts/sharp
@@ -1804,7 +1808,7 @@
 	icon_state = "roundlight"
 
 /datum/sprite_accessory/horns
-	icon = 'icons/mob/species/mutant_bodyparts.dmi'
+	icon = 'icons/mob/species/lizard/lizard_misc.dmi'
 	em_block = TRUE
 
 /datum/sprite_accessory/horns/none
@@ -1832,7 +1836,7 @@
 	icon_state = "angler"
 
 /datum/sprite_accessory/ears
-	icon = 'icons/mob/species/mutant_bodyparts.dmi'
+	icon = 'icons/mob/species/human/cat_features.dmi'
 	em_block = TRUE
 
 /datum/sprite_accessory/ears/none
@@ -1850,11 +1854,11 @@
 	icon_state = "none"
 
 /datum/sprite_accessory/wings
-	icon = 'icons/mob/clothing/wings.dmi'
+	icon = 'icons/mob/species/wings.dmi'
 	em_block = TRUE
 
 /datum/sprite_accessory/wings_open
-	icon = 'icons/mob/clothing/wings.dmi'
+	icon = 'icons/mob/species/wings.dmi'
 	em_block = TRUE
 
 /datum/sprite_accessory/wings/angel
@@ -1975,7 +1979,7 @@
 	dimension_y = 32
 
 /datum/sprite_accessory/frills
-	icon = 'icons/mob/species/mutant_bodyparts.dmi'
+	icon = 'icons/mob/species/lizard/lizard_misc.dmi'
 
 /datum/sprite_accessory/frills/none
 	name = "None"
@@ -1994,11 +1998,11 @@
 	icon_state = "aqua"
 
 /datum/sprite_accessory/spines
-	icon = 'icons/mob/species/mutant_bodyparts.dmi'
+	icon = 'icons/mob/species/lizard/lizard_spines.dmi'
 	em_block = TRUE
 
 /datum/sprite_accessory/spines_animated
-	icon = 'icons/mob/species/mutant_bodyparts.dmi'
+	icon = 'icons/mob/species/lizard/lizard_spines.dmi'
 	em_block = TRUE
 
 /datum/sprite_accessory/spines/none
@@ -2060,7 +2064,7 @@
 	name = DIGITIGRADE_LEGS
 
 /datum/sprite_accessory/caps
-	icon = 'icons/mob/species/mutant_bodyparts.dmi'
+	icon = 'icons/mob/species/mush_cap.dmi'
 	color_src = HAIR
 	em_block = TRUE
 
@@ -2165,7 +2169,7 @@
 /datum/sprite_accessory/moth_wings/plasmafire
 	name = "Plasmafire"
 	icon_state = "plasmafire"
-	
+
 /datum/sprite_accessory/moth_wings/moffra
 	name = "Moffra"
 	icon_state = "moffra"
@@ -2252,7 +2256,7 @@
 /datum/sprite_accessory/moth_antennae/plasmafire
 	name = "Plasmafire"
 	icon_state = "plasmafire"
-	
+
 /datum/sprite_accessory/moth_antennae/moffra
 	name = "Moffra"
 	icon_state = "moffra"

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

@@ -1757,7 +1757,7 @@ GLOBAL_LIST_EMPTY(features_by_species)
 			var/list/wings = list()
 			for(var/W in wings_icons)
 				var/datum/sprite_accessory/S = GLOB.wings_list[W] //Gets the datum for every wing this species has, then prompts user with a radial menu
-				var/image/img = image(icon = 'icons/mob/clothing/wings.dmi', icon_state = "m_wingsopen_[S.icon_state]_BEHIND") //Process the HUD elements
+				var/image/img = image(icon = 'icons/mob/species/wings.dmi', icon_state = "m_wingsopen_[S.icon_state]_BEHIND") //Process the HUD elements
 				img.transform *= 0.5
 				img.pixel_x = -32
 				if(wings[S.name])