Adds the proximity monitor component. Performance improvement for turf/Entered (#14196)

* proximity monitor

* Update code/__HELPERS/unsorted.dm

Co-authored-by: AffectedArc07 <25063394+AffectedArc07@users.noreply.github.com>

* farie review tweaks

* actually I need this

Co-authored-by: AffectedArc07 <25063394+AffectedArc07@users.noreply.github.com>

code/game/objects/items/devices/transfer_valve.dm

@@ -62,6 +62,8 @@
 		to_chat(user, "<span class='notice'>You attach the [A] to the valve controls and secure it.</span>")
 		A.holder = src
 		A.toggle_secure()	//this calls update_icon(), which calls update_icon() on the holder (i.e. the bomb).
+		if(istype(attached_device, /obj/item/assembly/prox_sensor))
+			AddComponent(/datum/component/proximity_monitor)
 
 		investigate_log("[key_name(user)] attached a [A] to a transfer valve.", INVESTIGATE_BOMB)
 		add_attack_logs(user, src, "attached [A] to a transfer valve", ATKLOG_FEW)
@@ -137,6 +139,7 @@
 				attached_device.forceMove(get_turf(src))
 				attached_device.holder = null
 				attached_device = null
+				qdel(GetComponent(/datum/component/proximity_monitor))
 				update_icon()
 		else
 			. = FALSE

code/game/objects/items/weapons/caution.dm

@@ -15,6 +15,10 @@
 	var/armed = 0
 	var/timepassed = 0
 
+/obj/item/caution/proximity_sign/ComponentInitialize()
+	. = ..()
+	AddComponent(/datum/component/proximity_monitor)
+
 /obj/item/caution/proximity_sign/attack_self(mob/user as mob)
 	if(ishuman(user))
 		var/mob/living/carbon/human/H = user
@@ -40,7 +44,7 @@
 		armed = 1
 		timing = 0
 
-/obj/item/caution/proximity_sign/HasProximity(atom/movable/AM as mob|obj)
+/obj/item/caution/proximity_sign/HasProximity(atom/movable/AM)
 	if(armed)
 		if(istype(AM, /mob/living/carbon) && !istype(AM, /mob/living/carbon/brain))
 			var/mob/living/carbon/C = AM

code/game/objects/items/weapons/grenades/chem_grenade.dm

@@ -190,6 +190,8 @@
 
 		user.drop_item()
 		nadeassembly = A
+		if(nadeassembly.has_prox_sensors())
+			AddComponent(/datum/component/proximity_monitor)
 		A.master = src
 		A.loc = src
 		assemblyattacher = user.ckey
@@ -219,6 +221,7 @@
 			nadeassembly.loc = get_turf(src)
 			nadeassembly.master = null
 			nadeassembly = null
+			qdel(GetComponent(/datum/component/proximity_monitor))
 		if(beakers.len)
 			for(var/obj/O in beakers)
 				O.loc = get_turf(src)
@@ -304,6 +307,8 @@
 /obj/item/grenade/chem_grenade/proc/CreateDefaultTrigger(var/typekey)
 	if(ispath(typekey,/obj/item/assembly))
 		nadeassembly = new(src)
+		if(nadeassembly.has_prox_sensors())
+			AddComponent(/datum/component/proximity_monitor)
 		nadeassembly.a_left = new /obj/item/assembly/igniter(nadeassembly)
 		nadeassembly.a_left.holder = nadeassembly
 		nadeassembly.a_left.secured = 1