[DNM][DNM][WIP] Projectile backend code port and update

Ports#54924,  #65061, #59804 from /tg.
adds auxiliary code from /tg to make code work.

code/game/objects/objs.dm

@@ -238,7 +238,11 @@
 /obj/get_dumping_location(datum/component/storage/source,mob/user)
 	return get_turf(src)
 
-/obj/proc/CanAStarPass()
+/obj/proc/CanAStarPass(ID, dir, caller)
+	if(ismovable(caller))
+		var/atom/movable/AM = caller
+		if(AM.pass_flags & pass_flags_self)
+			return TRUE
 	. = !density
 
 /obj/proc/check_uplink_validity()