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/modules/mob/living/carbon/human/human_defense.dm

@@ -875,3 +875,11 @@ emp_act
 	to_contaminate -= to_contaminate[1]
 	for(var/atom/thing in to_contaminate)
 		thing.AddComponent(/datum/component/radioactive, intensity, source, emission_type)
+
+/mob/living/carbon/human/proc/peel_off_synthetic_skin()
+	var/obj/item/organ/external/external_limb = get_organ(zone_selected)
+	if(external_limb && external_limb.augmented_skin_cover_level)
+		visible_message("<span class='warning'>[src] begins to pull at their skin...</span>")
+		if(!do_mob(src, src, 5 SECONDS))
+			return
+		external_limb.break_augmented_skin(TRUE)

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

@@ -1356,6 +1356,20 @@ GLOBAL_LIST_EMPTY(damage_icon_parts)
 
 	overlays_standing[INTORGAN_LAYER] = standing
 	apply_overlay(INTORGAN_LAYER)
+	update_hand_int_organs()
+
+/mob/living/carbon/human/proc/update_hand_int_organs()
+	remove_overlay(HAND_INTORGAN_LAYER)
+
+	var/list/standing = list()
+	for(var/organ in internal_organs)
+		var/obj/item/organ/internal/I = organ
+		var/extra_render = I.extra_render()
+		if(extra_render)
+			standing += extra_render
+
+	overlays_standing[HAND_INTORGAN_LAYER] = standing
+	apply_overlay(HAND_INTORGAN_LAYER)
 
 /mob/living/carbon/human/handle_transform_change()
 	..()

code/modules/mob/living/living_defense.dm

@@ -294,7 +294,11 @@
 // End BS12 momentum-transfer code.
 
 /mob/living/proc/grabbedby(mob/living/carbon/user, supress_message = FALSE)
-	if(user == src || anchored)
+	if(user == src && ishuman(user))
+		var/mob/living/carbon/human/self = user
+		INVOKE_ASYNC(self, TYPE_PROC_REF(/mob/living/carbon/human, peel_off_synthetic_skin))
+		return
+	if(anchored)
 		return FALSE
 	if(!(status_flags & CANPUSH))
 		return FALSE