Gives many cybernetics on mob sprites. Adds synthetic skin to allow hiding of them. (#30098)

* the first half

* rest of the skin

* duplicate

* new sprite / updated description / no more yell at me

* the rest of the owl

* oops, fixed

code/game/objects/items/stacks/synthetic_skin.dm

@@ -0,0 +1,44 @@
+/obj/item/stack/synthetic_skin
+	name = "level-1 synthetic skin plate"
+	desc = "A sheet of level-1 synthetic skin plating. Used as a cheap covering for cybernetic organs, is able to match the colour of the limb but not the texture."
+	icon = 'icons/obj/surgery.dmi'
+	icon_state = "skin_1"
+	w_class = WEIGHT_CLASS_SMALL
+	singular_name = "skin plate"
+	max_amount = 10
+	merge_type = /obj/item/stack/synthetic_skin
+	var/skin_level = 1
+
+/obj/item/stack/synthetic_skin/attack__legacy__attackchain(mob/living/M as mob, mob/user as mob)
+	if(!ishuman(M) || !istype(user))
+		return FALSE
+	var/mob/living/carbon/human/H = M
+	var/obj/item/organ/external/external_limb = H.get_organ(user.zone_selected)
+	if(external_limb)
+		user.visible_message("<span class='notice'>[user] starts to apply [src] on [H]'s [external_limb.name]...</span>")
+		if(!do_mob(user, H, 5 SECONDS))
+			return FALSE
+		use(1)
+		if(external_limb.apply_augmented_skin(skin_level))
+			user.visible_message("<span class='notice'>[user] applies some [src] on [H]'s [external_limb.name].</span>")
+			return TRUE
+		else
+			to_chat(user, "<span class='warning'>You fail to apply a better skin cover to [H]'s [external_limb.name].</span>")
+			return FALSE
+
+/obj/item/stack/synthetic_skin/level_2
+	name = "level-2 synthetic skin patch"
+	desc = "A sealed patch of synthetic skin. An improvement over the basic version, more water resistant and less prone to peeling off."
+	icon_state = "skin_2"
+	merge_type = /obj/item/stack/synthetic_skin/level_2
+	singular_name = "skin patch"
+	skin_level = 2
+
+
+/obj/item/stack/synthetic_skin/level_3
+	name = "level-3 synthetic skin foam"
+	desc = "A nanite foam injector meeting the requirements of level-3 synthetic skin. The best one can buy, best used to hide major cybernetic alterations, for beauty or for infiltration."
+	icon_state = "skin_3"
+	merge_type = /obj/item/stack/synthetic_skin/level_3
+	singular_name = "nanite foam"
+	skin_level = 3

code/game/objects/items/storage/firstaid.dm

@@ -155,6 +155,7 @@
 	new /obj/item/stack/cable_coil(src)
 	new /obj/item/stack/cable_coil(src)
 	new /obj/item/robotanalyzer(src)
+	new /obj/item/stack/synthetic_skin(src, 3)
 
 /obj/item/storage/firstaid/machine/empty/populate_contents()
 	return