Making bullets and tachyon penetrate closets (#6449)

This Pr makes any bullet or tachyon projectiles penetrate closets. Upon penetration each mob inside of locker will get damaged by the projectile.

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

@@ -209,6 +209,11 @@
 	var/proj_damage = Proj.get_structure_damage()
 	if(!proj_damage)
 		return
+	
+	if(Proj.penetrating || istype(Proj, /obj/item/projectile/bullet))
+		var/distance = get_dist(Proj.starting, get_turf(loc))
+		for(var/mob/living/L in contents)
+			Proj.attack_mob(L, distance)
 
 	..()
 	damage(proj_damage)