Makes reagent updates more event based, also makes plasma boil properly. (#54790)

Converts most on_reagent_change calls to signals.
Converts on_reagent_change to a signal handler.
Expands the reagent exposure signals
Add a setter proc and signal for reagent temperature
Fixes adjust_thermal_energy not sending a temperature change event
Makes min_temp and max_temp actually do something with adjust_thermal_energy

code/datums/components/crafting/crafting.dm

@@ -252,7 +252,7 @@
 							RGNT.volume += RG.volume
 							RGNT.data += RG.data
 							qdel(RG)
-						RC.on_reagent_change()
+						SEND_SIGNAL(RC.reagents, COMSIG_REAGENTS_CRAFTING_PING) // - [] TODO: Make this entire thing less spaghetti
 					else
 						surroundings -= RC
 			else if(ispath(A, /obj/item/stack))

code/datums/components/plumbing/reaction_chamber.dm

@@ -35,4 +35,4 @@
 
 	RC.emptying = TRUE //If we move this up, it'll instantly get turned off since any reaction always sets the reagent_total to zero. Other option is make the reaction update
 	//everything for every chemical removed, wich isn't a good option either.
-	RC.on_reagent_change() //We need to check it now, because some reactions leave nothing left.
+	RC.on_reagent_change(reagents) //We need to check it now, because some reactions leave nothing left.