[MIRROR] Splits projectiles into different files for readability (#5800)

* Splits projectiles into different files for readability

* Update tgstation.dme

* I love how the dme cleans itself up

code/modules/projectiles/projectile/reusable/_reusable.dm

@@ -0,0 +1,20 @@
+/obj/item/projectile/bullet/reusable
+	name = "reusable bullet"
+	desc = "How do you even reuse a bullet?"
+	var/ammo_type = /obj/item/ammo_casing/caseless
+	var/dropped = FALSE
+	impact_effect_type = null
+
+/obj/item/projectile/bullet/reusable/on_hit(atom/target, blocked = FALSE)
+	. = ..()
+	handle_drop()
+
+/obj/item/projectile/bullet/reusable/on_range()
+	handle_drop()
+	..()
+
+/obj/item/projectile/bullet/reusable/proc/handle_drop()
+	if(!dropped)
+		var/turf/T = get_turf(src)
+		new ammo_type(T)
+		dropped = TRUE