[MIRROR] Drowsiness refactor [MDB IGNORE] (#8836)

* Drowsiness refactor (#62104)

Creates two procs in /mob/status_procs for handling drowsiness changes (with check for negative values), and refactors all code to use these procs instead of assigning values to the mob's drowsiness themselves.

* Drowsiness refactor

* Fixing more stuff in our code

Co-authored-by: thatoneplebeian <67017991+thatoneplebeian@users.noreply.github.com>
Co-authored-by: GoldenAlpharex <jerego1234@hotmail.com>

code/datums/brain_damage/severe.dm

@@ -138,7 +138,7 @@
 		owner.Sleeping(60)
 	else if(!owner.drowsyness && DT_PROB(sleep_chance, delta_time))
 		to_chat(owner, span_warning("You feel tired..."))
-		owner.drowsyness += 10
+		owner.adjust_drowsyness(10)
 
 /datum/brain_trauma/severe/monophobia
 	name = "Monophobia"

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

@@ -52,7 +52,7 @@ Bonus
 			if(prob(50))
 				to_chat(M, span_warning("You try to focus on staying awake."))
 			if(M.drowsyness < 70)
-				M.drowsyness += 5
+				M.adjust_drowsyness(5)
 		if(4)
 			if(prob(50))
 				if(yawning)
@@ -60,7 +60,7 @@ Bonus
 				else
 					to_chat(M, span_warning("You nod off for a moment.")) //you can't really yawn while nodding off, can you?
 			if(M.drowsyness < 70)
-				M.drowsyness += 10
+				M.adjust_drowsyness(10)
 			if(yawning)
 				M.emote("yawn")
 				if(M.CanSpreadAirborneDisease())
@@ -69,7 +69,7 @@ Bonus
 			if(prob(50))
 				to_chat(M, span_warning("[pick("So tired...","You feel very sleepy.","You have a hard time keeping your eyes open.","You try to stay awake.")]"))
 			if(M.drowsyness < 70)
-				M.drowsyness += 40
+				M.adjust_drowsyness(40)
 			if(yawning)
 				M.emote("yawn")
 				if(M.CanSpreadAirborneDisease())

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

@@ -37,7 +37,7 @@
 
 	if(A.stage >= 3)
 		M.dizziness = max(0, M.dizziness - 2)
-		M.drowsyness = max(0, M.drowsyness - 2)
+		M.adjust_drowsyness(-2)
 		M.slurring = max(0, M.slurring - 2)
 		M.set_confusion(max(0, M.get_confusion() - 2))
 		if(purge_alcohol)
@@ -47,7 +47,7 @@
 				H.drunkenness = max(H.drunkenness - 5, 0)
 
 	if(A.stage >= 4)
-		M.drowsyness = max(0, M.drowsyness - 2)
+		M.adjust_drowsyness(-2)
 		if(M.reagents.has_reagent(/datum/reagent/toxin/mindbreaker))
 			M.reagents.remove_reagent(/datum/reagent/toxin/mindbreaker, 5)
 		if(M.reagents.has_reagent(/datum/reagent/toxin/histamine))