Boxcutting wrapped packages returns less wrap (#95485)

## About The Pull Request

Currently, when you use boxcutters to cut open wrapped packages, you get
a full stack (25) of wrapping paper back, even though it takes at most 3
wrapping paper to wrap it in the first place, meaning you can make the
paper multiply infinitely. This PR changes that so you only get one
wrapping paper back.
## Why It's Good For The Game
If you use one wrap to wrap something, you should not get twenty five
wrap when unwrapping it
## Changelog
🆑
fix: Fixed an oversight with package wrapping
/🆑

code/game/objects/items/stacks/wrap.dm

@@ -219,6 +219,9 @@
 	amount = 5
 	merge_type = /obj/item/stack/package_wrap/small
 
+/obj/item/stack/package_wrap/one
+	amount = 1
+
 /obj/item/c_tube
 	name = "cardboard tube"
 	desc = "A tube... of cardboard."