[MIRROR] Add weakref support to qdel (#2742)

* Add weakref support to qdel (#56171)

qdel() should allow usage of weakrefs to avoid harddels on long duration qdel_in usage

* Add weakref support to qdel

Co-authored-by: spookydonut <github@spooksoftware.com>

code/controllers/subsystem/garbage.dm

@@ -284,15 +284,21 @@ SUBSYSTEM_DEF(garbage)
 ///
 /// Datums passed to this will be given a chance to clean up references to allow the GC to collect them.
 /proc/qdel(datum/D, force=FALSE, ...)
+	if(isweakref(D))
+		var/datum/weakref/weakref = D
+		D = weakref.resolve()
+		if(!D)
+			return
+
 	if(!istype(D))
 		del(D)
 		return
+
 	var/datum/qdel_item/I = SSgarbage.items[D.type]
 	if (!I)
 		I = SSgarbage.items[D.type] = new /datum/qdel_item(D.type)
 	I.qdels++
 
-
 	if(isnull(D.gc_destroyed))
 		if (SEND_SIGNAL(D, COMSIG_PARENT_PREQDELETED, force)) // Give the components a chance to prevent their parent from being deleted
 			return