[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/structures/crates_lockers/closets.dm

@@ -110,10 +110,10 @@
 	if(HAS_TRAIT(user, TRAIT_SKITTISH))
 		. += "<span class='notice'>If you bump into [p_them()] while running, you will jump inside.</span>"
 
-/obj/structure/closet/CanPass(atom/movable/mover, turf/target)
+/obj/structure/closet/CanAllowThrough(atom/movable/mover, turf/target)
+	. = ..()
 	if(wall_mounted)
 		return TRUE
-	return !density
 
 /obj/structure/closet/proc/can_open(mob/living/user, force = FALSE)
 	if(force)

code/game/objects/structures/crates_lockers/crates.dm

@@ -26,15 +26,15 @@
 	// 	AddElement(/datum/element/climbable, climb_time = crate_climb_time, climb_stun = 0)
 	update_icon()
 
-/obj/structure/closet/crate/CanPass(atom/movable/mover, turf/target)
+/obj/structure/closet/crate/CanAllowThrough(atom/movable/mover, turf/target)
+	. = ..()
 	if(!istype(mover, /obj/structure/closet))
 		var/obj/structure/closet/crate/locatedcrate = locate(/obj/structure/closet/crate) in get_turf(mover)
 		if(locatedcrate) //you can walk on it like tables, if you're not in an open crate trying to move to a closed crate
 			if(opened) //if we're open, allow entering regardless of located crate openness
-				return 1
+				return TRUE
 			if(!locatedcrate.opened) //otherwise, if the located crate is closed, allow entering
-				return 1
-	return !density
+				return TRUE
 
 /obj/structure/closet/crate/update_icon_state()
 	icon_state = "[initial(icon_state)][opened ? "open" : ""]"