Machine Upgrade Update

- Partial port of tgstation/-tg-station#9813

code/modules/admin/machine_upgrade.dm

@@ -0,0 +1,10 @@
+/proc/machine_upgrade(obj/machinery/M in world)
+	set name = "Tweak Component Ratings"
+	set category = "Debug"
+	var/new_rating = input("Enter new rating:","Num") as num
+	if(new_rating && M.component_parts)
+		for(var/obj/item/weapon/stock_parts/P in M.component_parts)
+			P.rating = new_rating
+		M.RefreshParts()
+
+	feedback_add_details("admin_verb","MU") //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!