Organ damage refactor/cleanup (#93436)

## About The Pull Request
So, my original goal was just a refactor for the emissive overlays of
eyes, as a way to implement the specular emissive introduced by smartkar
some time ago, but somehow I found myself dragged into a bigger refactor
or cleanup of organ damage, thresholds, failures. One of the main
problem was that there were no procs called when a organ suffered enough
damage to fail or when recovering from failure. It'd just enable or
disable a bitflag, leaving it up to subtypes to decide how to tackle
organ failure their own ways: diverse, funky and sometimes incompatible.
More often than not relying on their very own "update_thingamajig" kinda
procs that run whenever the organ takes damage, rather than just when
the threshold is reached (low, high, failure. There are however a couple
organs with their own quirky thresholds, I let those slide).

There's also a bit of old code, especially for ears, with the
`AdjustEarDamage` and temporary deafness both predating the framework
for organ damage as far as I know. It really needed a coat of fresh
paint.

Oh, there were also more than a handful of organs that still heavily
relied on some ORGAN_TRAIT source instead of the `organ_traits` list and
the two add/remove procs `add_organ_trait` or `remove_organ_trait`. This
include organs that lose or gain specific traits when failing et
viceversa.

~~Lastly, felinids (and the halloween ghost species) having reflective
eyes. It's just a nod to the tapetum lucidum that animals with night
vision often have (including cats), which is why their eyes are a bit
brighter in the dark. Felinids however, do not have night vision (nor do
ghosts). This is merely cosmetic.~~ Cut out for the time being due to
issues with the specular emissive...

## Why It's Good For The Game
Refactoring / cleaning up old organ code.

## Changelog

🆑
refactor: Refactored organ damage code a little. Hopefully there won't
be issues (otherwise report them).
/🆑

code/datums/diseases/advance/symptoms/deafness.dm

@@ -45,7 +45,6 @@
 		return
 
 	var/mob/living/carbon/infected_mob = advanced_disease.affected_mob
-	var/obj/item/organ/ears/ears = infected_mob.get_organ_slot(ORGAN_SLOT_EARS)
 
 	switch(advanced_disease.stage)
 		if(3, 4)
@@ -53,15 +52,18 @@
 				to_chat(infected_mob, span_warning("[pick("You hear a ringing in your ear.", "Your ears pop.")]"))
 		if(5)
 			if(causes_permanent_deafness)
-				if(ears.damage < ears.maxHealth)
+				if(!HAS_TRAIT_FROM(infected_mob, TRAIT_DEAF, DISEASE_TRAIT))
 					to_chat(infected_mob, span_userdanger("Your ears pop painfully and start bleeding!"))
 					// Just absolutely murder me man
-					ears.apply_organ_damage(ears.maxHealth)
+					infected_mob.adjustOrganLoss(ORGAN_SLOT_EARS, INFINITY)
 					infected_mob.emote("scream")
 					ADD_TRAIT(infected_mob, TRAIT_DEAF, DISEASE_TRAIT)
 			else
 				to_chat(infected_mob, span_userdanger("Your ears pop and begin ringing loudly!"))
-				ears.deaf = min(20, ears.deaf + 15)
+				var/obj/item/organ/ears/ears = infected_mob.get_organ_slot(ORGAN_SLOT_EARS)
+				var/deafness_to_add = min(40 SECONDS - ears.temporary_deafness, 30 SECONDS)
+				if(deafness_to_add > 0)
+					ears.adjust_temporary_deafness(deafness_to_add)
 
 /datum/symptom/deafness/on_stage_change(datum/disease/advance/advanced_disease)
 	. = ..()

code/datums/diseases/advance/symptoms/sensory.dm

@@ -96,7 +96,8 @@
 		if(4, 5)
 			if(advanced_disease.has_required_infectious_organ(infected_mob, ORGAN_SLOT_EARS))
 				var/obj/item/organ/ears/ears = infected_mob.get_organ_slot(ORGAN_SLOT_EARS)
-				ears.adjustEarDamage(-4, -4)
+				ears?.apply_organ_damage(-4)
+				ears?.adjust_temporary_deafness(-8 SECONDS)
 
 			if(!advanced_disease.has_required_infectious_organ(infected_mob, ORGAN_SLOT_EYES))
 				return