bigger mobs have some special health bars (#49104)

* cool beans

* more, more!

* smol fix

code/modules/mob/living/living_defines.dm

@@ -94,6 +94,7 @@
 	var/smoke_delay = 0 //used to prevent spam with smoke reagent reaction on mob.
 
 	var/bubble_icon = "default" //what icon the mob uses for speechbubbles
+	var/health_doll_icon //if this exists AND the normal sprite is bigger than 32x32, this is the replacement icon state (because health doll size limitations). the icon will always be screen_gen.dmi
 
 	var/last_bumped = 0
 	var/unique_name = 0 //if a mob's name should be appended with an id when created e.g. Mob (666)