Atoms can now be stationloving (#24748)

* Objects can now be stationloving

Stationloving objects are objects that love the station so much, they
will relocate back to the station if spaced or if destroyed.

Yes, this does sound a lot like the behaviour of the nuke disk. Except
made more generic.

Currently the only stationloving object is the nuke disk.

* Moved from /obj to /atom/movable

* Remie fix

code/controllers/subsystem/processing/inbounds.dm

@@ -0,0 +1,32 @@
+var/datum/controller/subsystem/objects/SSinbounds
+/datum/controller/subsystem/inbounds
+	name = "Inbounds"
+	priority = 40
+	flags = SS_NO_INIT
+
+	var/list/processing = list()
+	var/list/currentrun = list()
+
+/datum/controller/subsystem/inbounds/New()
+	NEW_SS_GLOBAL(SSinbounds)
+/datum/controller/subsystem/inbounds/stat_entry()
+	..("P:[processing.len]")
+
+/datum/controller/subsystem/inbounds/fire(resumed = 0)
+	if (!resumed)
+		src.currentrun = processing.Copy()
+	//cache for sanic speed (lists are references anyways)
+	var/list/currentrun = src.currentrun
+
+	while(currentrun.len)
+		var/atom/movable/thing = currentrun[currentrun.len]
+		currentrun.len--
+		if(thing)
+			thing.check_in_bounds(wait)
+		else
+			SSinbounds.processing -= thing
+		if(MC_TICK_CHECK)
+			return
+
+/datum/controller/subsystem/inbounds/Recover()
+	processing = SSinbounds.processing