Moves gauze removal signals to gauze destroy, removing weird seep_gauze usages + misc improvements (#78570)

## About The Pull Request

Title. 
## Why It's Good For The Game
Gauze removal was handled by using seep_gauze(9999) instead of just
deleting it, which was really fucking weird??
 
This makes behavior more sensical and modular (you can remove gauze
without using seep_gauze now).
## Changelog
🆑
code: Gauze removal is now handled by the gauze's destroy instead of
seep_gauze
/🆑

code/__DEFINES/dcs/signals/signals_mob/signals_mob_carbon.dm

@@ -36,8 +36,10 @@
 #define COMSIG_BODYPART_ATTACHED "bodypart_removed"
 ///from base of /obj/item/bodypart/proc/try_attach_limb(): (new_limb, special)
 #define COMSIG_CARBON_POST_ATTACH_LIMB "carbon_post_attach_limb"
-#define COMSIG_BODYPART_GAUZED "bodypart_gauzed" // from /obj/item/bodypart/proc/apply_gauze(/obj/item/stack/gauze)
-#define COMSIG_BODYPART_GAUZE_DESTROYED "bodypart_degauzed" // from [/obj/item/bodypart/proc/seep_gauze] when it runs out of absorption
+/// from /obj/item/bodypart/proc/apply_gauze(/obj/item/stack/gauze): (/obj/item/stack/medical/gauze/applied_gauze, /obj/item/stack/medical/gauze/stack_used)
+#define COMSIG_BODYPART_GAUZED "bodypart_gauzed"
+/// from /obj/item/stack/medical/gauze/Destroy(): (/obj/item/stack/medical/gauze/removed_gauze)
+#define COMSIG_BODYPART_UNGAUZED "bodypart_ungauzed"
 
 /// Called from bodypart changing owner, which could be on attach or detachment. Either argument can be null. (mob/living/carbon/new_owner, mob/living/carbon/old_owner)
 #define COMSIG_BODYPART_CHANGED_OWNER "bodypart_changed_owner"

code/datums/wounds/_wounds.dm

@@ -290,7 +290,7 @@
 	. = limb
 	if(limb) // if we're nulling limb, we're basically detaching from it, so we should remove ourselves in that case
 		UnregisterSignal(limb, COMSIG_QDELETING)
-		UnregisterSignal(limb, list(COMSIG_BODYPART_GAUZED, COMSIG_BODYPART_GAUZE_DESTROYED))
+		UnregisterSignal(limb, list(COMSIG_BODYPART_GAUZED, COMSIG_BODYPART_UNGAUZED))
 		LAZYREMOVE(limb.wounds, src)
 		limb.update_wounds(replaced)
 		if (disabling)
@@ -302,7 +302,7 @@
 
 	if (limb)
 		RegisterSignal(limb, COMSIG_QDELETING, PROC_REF(source_died))
-		RegisterSignals(limb, list(COMSIG_BODYPART_GAUZED, COMSIG_BODYPART_GAUZE_DESTROYED), PROC_REF(gauze_state_changed))
+		RegisterSignals(limb, list(COMSIG_BODYPART_GAUZED, COMSIG_BODYPART_UNGAUZED), PROC_REF(gauze_state_changed))
 		if (disabling)
 			limb.add_traits(list(TRAIT_PARALYSIS, TRAIT_DISABLED_BY_WOUND), REF(src))
 
@@ -442,7 +442,7 @@
 				set_interaction_efficiency_penalty(initial(interaction_efficiency_penalty))
 
 		if(initial(disabling))
-			set_disabling(!limb.current_gauze)
+			set_disabling(isnull(limb.current_gauze))
 
 		limb.update_wounds(replaced_or_replacing)
 

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

@@ -159,6 +159,15 @@
 	splint_factor = 0.7
 	burn_cleanliness_bonus = 0.35
 	merge_type = /obj/item/stack/medical/gauze
+	var/obj/item/bodypart/gauzed_bodypart
+
+/obj/item/stack/medical/gauze/Destroy(force)
+	. = ..()
+
+	if (gauzed_bodypart)
+		gauzed_bodypart.current_gauze = null
+		SEND_SIGNAL(gauzed_bodypart, COMSIG_BODYPART_UNGAUZED, src)
+	gauzed_bodypart = null
 
 // gauze is only relevant for wounds, which are handled in the wounds themselves
 /obj/item/stack/medical/gauze/try_heal(mob/living/patient, mob/user, silent)

code/modules/surgery/bodyparts/_bodyparts.dm

@@ -152,7 +152,7 @@
 	/// How much generic bleedstacks we have on this bodypart
 	var/generic_bleedstacks
 	/// If we have a gauze wrapping currently applied (not including splints)
-	var/obj/item/stack/current_gauze
+	var/obj/item/stack/medical/gauze/current_gauze
 	/// If something is currently grasping this bodypart and trying to staunch bleeding (see [/obj/item/hand_item/self_grasp])
 	var/obj/item/hand_item/self_grasp/grasped_by
 
@@ -404,10 +404,10 @@
 	var/atom/drop_loc = drop_location()
 	if(IS_ORGANIC_LIMB(src))
 		playsound(drop_loc, 'sound/misc/splort.ogg', 50, TRUE, -1)
-	seep_gauze(9999) // destroy any existing gauze if any exists
-	for(var/obj/item/organ/bodypart_organ in get_organs())
+	QDEL_NULL(current_gauze)
+	for(var/obj/item/organ/bodypart_organ as anything in get_organs())
 		bodypart_organ.transfer_to_limb(src, owner)
-	for(var/obj/item/organ/external/external in external_organs)
+	for(var/obj/item/organ/external/external as anything in external_organs)
 		external.remove_from_limb()
 		external.forceMove(drop_loc)
 	for(var/obj/item/item_in_bodypart in src)
@@ -1212,17 +1212,18 @@
  * Arguments:
  * * gauze- Just the gauze stack we're taking a sheet from to apply here
  */
-/obj/item/bodypart/proc/apply_gauze(obj/item/stack/gauze)
-	if(!istype(gauze) || !gauze.absorption_capacity)
+/obj/item/bodypart/proc/apply_gauze(obj/item/stack/medical/gauze/new_gauze)
+	if(!istype(new_gauze) || !new_gauze.absorption_capacity)
 		return
 	var/newly_gauzed = FALSE
 	if(!current_gauze)
 		newly_gauzed = TRUE
 	QDEL_NULL(current_gauze)
-	current_gauze = new gauze.type(src, 1)
-	gauze.use(1)
+	current_gauze = new new_gauze.type(src, 1)
+	new_gauze.use(1)
+	current_gauze.gauzed_bodypart = src
 	if(newly_gauzed)
-		SEND_SIGNAL(src, COMSIG_BODYPART_GAUZED, gauze)
+		SEND_SIGNAL(src, COMSIG_BODYPART_GAUZED, current_gauze, new_gauze)
 
 /**
  * seep_gauze() is for when a gauze wrapping absorbs blood or pus from wounds, lowering its absorption capacity.
@@ -1239,7 +1240,6 @@
 	if(current_gauze.absorption_capacity <= 0)
 		owner.visible_message(span_danger("\The [current_gauze.name] on [owner]'s [name] falls away in rags."), span_warning("\The [current_gauze.name] on your [name] falls away in rags."), vision_distance=COMBAT_MESSAGE_RANGE)
 		QDEL_NULL(current_gauze)
-		SEND_SIGNAL(src, COMSIG_BODYPART_GAUZE_DESTROYED)
 
 ///Loops through all of the bodypart's external organs and update's their color.
 /obj/item/bodypart/proc/recolor_external_organs()