Obliterates item_color: new washing machine functionality edition (#45961)

About The Pull Request

Completely removes item_color and the clusterfuck of bad programming it caused.

In places where item_color was used for entirely unique purposes it was split off and renamed to a new var on that typepath only, or refactored so it wasn't needed

In places where item_color was used as a dye color, it was converted to the new dye_color var

In places where item_color was used as the worn overlay it was removed and instead now icon_state is always used as the clothing overlay.

A new mob_overlay_icon var was added for manually setting where the mob overlay icon path is for specific items.

Moved some mob overlay files relating to clothing to their own directory as well for organization purposes.

Totally refactors washing machines, instead of the horrible abortion that was iterating through the typepath it now uses a registry of dye results.

Some bonus functionality to come out of this:
the washing machine now supports arbitrary dye colors.
Why It's Good For The Game

It's been 4 years since the "this should be deprecated soonish" comment was added, and this var is a shitpile of confusion if you just trace the usage of it.
Changelog

cl
add: Washing machines now support arbitrary dye color
add: Washing machines now dye nearly every item.
refactor: lots of backend changes to clothing overlays, report any issues
/cl

code/game/objects/structures/bedsheet_bin.dm

@@ -18,8 +18,8 @@ LINEN BINS
 	throw_speed = 1
 	throw_range = 2
 	w_class = WEIGHT_CLASS_TINY
-	item_color = "white"
 	resistance_flags = FLAMMABLE
+	dying_key = DYE_REGISTRY_BEDSHEET
 
 	dog_fashion = /datum/dog_fashion/head/ghost
 	var/list/dream_messages = list("white")
@@ -57,31 +57,26 @@ LINEN BINS
 /obj/item/bedsheet/blue
 	icon_state = "sheetblue"
 	item_state = "sheetblue"
-	item_color = "blue"
 	dream_messages = list("blue")
 
 /obj/item/bedsheet/green
 	icon_state = "sheetgreen"
 	item_state = "sheetgreen"
-	item_color = "green"
 	dream_messages = list("green")
 
 /obj/item/bedsheet/grey
 	icon_state = "sheetgrey"
 	item_state = "sheetgrey"
-	item_color = "grey"
 	dream_messages = list("grey")
 
 /obj/item/bedsheet/orange
 	icon_state = "sheetorange"
 	item_state = "sheetorange"
-	item_color = "orange"
 	dream_messages = list("orange")
 
 /obj/item/bedsheet/purple
 	icon_state = "sheetpurple"
 	item_state = "sheetpurple"
-	item_color = "purple"
 	dream_messages = list("purple")
 
 /obj/item/bedsheet/patriot
@@ -89,7 +84,6 @@ LINEN BINS
 	desc = "You've never felt more free than when sleeping on this."
 	icon_state = "sheetUSA"
 	item_state = "sheetUSA"
-	item_color = "sheetUSA"
 	dream_messages = list("America", "freedom", "fireworks", "bald eagles")
 
 /obj/item/bedsheet/rainbow
@@ -97,19 +91,16 @@ LINEN BINS
 	desc = "A multicolored blanket. It's actually several different sheets cut up and sewn together."
 	icon_state = "sheetrainbow"
 	item_state = "sheetrainbow"
-	item_color = "rainbow"
 	dream_messages = list("red", "orange", "yellow", "green", "blue", "purple", "a rainbow")
 
 /obj/item/bedsheet/red
 	icon_state = "sheetred"
 	item_state = "sheetred"
-	item_color = "red"
 	dream_messages = list("red")
 
 /obj/item/bedsheet/yellow
 	icon_state = "sheetyellow"
 	item_state = "sheetyellow"
-	item_color = "yellow"
 	dream_messages = list("yellow")
 
 /obj/item/bedsheet/mime
@@ -117,7 +108,6 @@ LINEN BINS
 	desc = "A very soothing striped blanket.  All the noise just seems to fade out when you're under the covers in this."
 	icon_state = "sheetmime"
 	item_state = "sheetmime"
-	item_color = "mime"
 	dream_messages = list("silence", "gestures", "a pale face", "a gaping mouth", "the mime")
 
 /obj/item/bedsheet/clown
@@ -125,7 +115,6 @@ LINEN BINS
 	desc = "A rainbow blanket with a clown mask woven in. It smells faintly of bananas."
 	icon_state = "sheetclown"
 	item_state = "sheetrainbow"
-	item_color = "clown"
 	dream_messages = list("honk", "laughter", "a prank", "a joke", "a smiling face", "the clown")
 
 /obj/item/bedsheet/captain
@@ -133,7 +122,6 @@ LINEN BINS
 	desc = "It has a Nanotrasen symbol on it, and was woven with a revolutionary new kind of thread guaranteed to have 0.01% permeability for most non-chemical substances, popular among most modern captains."
 	icon_state = "sheetcaptain"
 	item_state = "sheetcaptain"
-	item_color = "captain"
 	dream_messages = list("authority", "a golden ID", "sunglasses", "a green disc", "an antique gun", "the captain")
 
 /obj/item/bedsheet/rd
@@ -141,7 +129,6 @@ LINEN BINS
 	desc = "It appears to have a beaker emblem, and is made out of fire-resistant material, although it probably won't protect you in the event of fires you're familiar with every day."
 	icon_state = "sheetrd"
 	item_state = "sheetrd"
-	item_color = "director"
 	dream_messages = list("authority", "a silvery ID", "a bomb", "a mech", "a facehugger", "maniacal laughter", "the research director")
 
 // for Free Golems.
@@ -155,7 +142,6 @@ LINEN BINS
 	desc = "It's a sterilized* blanket commonly used in the Medbay.  *Sterilization is voided if a virologist is present onboard the station."
 	icon_state = "sheetmedical"
 	item_state = "sheetmedical"
-	item_color = "medical"
 	dream_messages = list("healing", "life", "surgery", "a doctor")
 
 /obj/item/bedsheet/cmo
@@ -163,7 +149,6 @@ LINEN BINS
 	desc = "It's a sterilized blanket that has a cross emblem. There's some cat fur on it, likely from Runtime."
 	icon_state = "sheetcmo"
 	item_state = "sheetcmo"
-	item_color = "cmo"
 	dream_messages = list("authority", "a silvery ID", "healing", "life", "surgery", "a cat", "the chief medical officer")
 
 /obj/item/bedsheet/hos
@@ -171,7 +156,6 @@ LINEN BINS
 	desc = "It is decorated with a shield emblem. While crime doesn't sleep, you do, but you are still THE LAW!"
 	icon_state = "sheethos"
 	item_state = "sheethos"
-	item_color = "hosred"
 	dream_messages = list("authority", "a silvery ID", "handcuffs", "a baton", "a flashbang", "sunglasses", "the head of security")
 
 /obj/item/bedsheet/hop
@@ -179,7 +163,6 @@ LINEN BINS
 	desc = "It is decorated with a key emblem. For those rare moments when you can rest and cuddle with Ian without someone screaming for you over the radio."
 	icon_state = "sheethop"
 	item_state = "sheethop"
-	item_color = "hop"
 	dream_messages = list("authority", "a silvery ID", "obligation", "a computer", "an ID", "a corgi", "the head of personnel")
 
 /obj/item/bedsheet/ce
@@ -187,7 +170,6 @@ LINEN BINS
 	desc = "It is decorated with a wrench emblem. It's highly reflective and stain resistant, so you don't need to worry about ruining it with oil."
 	icon_state = "sheetce"
 	item_state = "sheetce"
-	item_color = "chief"
 	dream_messages = list("authority", "a silvery ID", "the engine", "power tools", "an APC", "a parrot", "the chief engineer")
 
 /obj/item/bedsheet/qm
@@ -195,19 +177,16 @@ LINEN BINS
 	desc = "It is decorated with a crate emblem in silver lining.  It's rather tough, and just the thing to lie on after a hard day of pushing paper."
 	icon_state = "sheetqm"
 	item_state = "sheetqm"
-	item_color = "qm"
 	dream_messages = list("a grey ID", "a shuttle", "a crate", "a sloth", "the quartermaster")
 
 /obj/item/bedsheet/brown
 	icon_state = "sheetbrown"
 	item_state = "sheetbrown"
-	item_color = "cargo"
 	dream_messages = list("brown")
 
 /obj/item/bedsheet/black
 	icon_state = "sheetblack"
 	item_state = "sheetblack"
-	item_color = "black"
 	dream_messages = list("black")
 
 /obj/item/bedsheet/centcom
@@ -215,7 +194,6 @@ LINEN BINS
 	desc = "Woven with advanced nanothread for warmth as well as being very decorated, essential for all officials."
 	icon_state = "sheetcentcom"
 	item_state = "sheetcentcom"
-	item_color = "centcom"
 	dream_messages = list("a unique ID", "authority", "artillery", "an ending")
 
 /obj/item/bedsheet/syndie
@@ -223,7 +201,6 @@ LINEN BINS
 	desc = "It has a syndicate emblem and it has an aura of evil."
 	icon_state = "sheetsyndie"
 	item_state = "sheetsyndie"
-	item_color = "syndie"
 	dream_messages = list("a green disc", "a red crystal", "a glowing blade", "a wire-covered ID")
 
 /obj/item/bedsheet/cult
@@ -231,7 +208,6 @@ LINEN BINS
 	desc = "You might dream of Nar'Sie if you sleep with this. It seems rather tattered and glows of an eldritch presence."
 	icon_state = "sheetcult"
 	item_state = "sheetcult"
-	item_color = "cult"
 	dream_messages = list("a tome", "a floating red crystal", "a glowing sword", "a bloody symbol", "a massive humanoid figure")
 
 /obj/item/bedsheet/wiz
@@ -239,7 +215,6 @@ LINEN BINS
 	desc = "A special fabric enchanted with magic so you can have an enchanted night. It even glows!"
 	icon_state = "sheetwiz"
 	item_state = "sheetwiz"
-	item_color = "wiz"
 	dream_messages = list("a book", "an explosion", "lightning", "a staff", "a skeleton", "a robe", "magic")
 
 /obj/item/bedsheet/nanotrasen
@@ -247,13 +222,11 @@ LINEN BINS
 	desc = "It has the Nanotrasen logo on it and has an aura of duty."
 	icon_state = "sheetNT"
 	item_state = "sheetNT"
-	item_color = "nanotrasen"
 	dream_messages = list("authority", "an ending")
 
 /obj/item/bedsheet/ian
 	icon_state = "sheetian"
 	item_state = "sheetian"
-	item_color = "ian"
 	dream_messages = list("a dog", "a corgi", "woof", "bark", "arf")
 
 /obj/item/bedsheet/cosmos
@@ -261,14 +234,12 @@ LINEN BINS
 	desc = "Made from the dreams of those who wonder at the stars."
 	icon_state = "sheetcosmos"
 	item_state = "sheetcosmos"
-	item_color = "cosmos"
 	dream_messages = list("the infinite cosmos", "Hans Zimmer music", "a flight through space", "the galaxy", "being fabulous", "shooting stars")
 	light_power = 2
 	light_range = 1.4
 
 /obj/item/bedsheet/random
 	icon_state = "random_bedsheet"
-	item_color = "rainbow"
 	name = "random bedsheet"
 	desc = "If you're reading this description ingame, something has gone wrong! Honk!"
 
@@ -280,7 +251,6 @@ LINEN BINS
 
 /obj/item/bedsheet/dorms
 	icon_state = "random_bedsheet"
-	item_color = "rainbow"
 	name = "random dorms bedsheet"
 	desc = "If you're reading this description ingame, something has gone wrong! Honk!"