## About The Pull Request
Adds /datum/element/sticker, and /datum/component/attached_sticker
Sticker items now mostly operate off /datum/element/sticker
The sticker element, hooks the whole "attach to stuff" and adds the
attached_sticker component to its target
The attached_sticker component, adds the overlay, hooks the clean and
on-fire signals.
## Why It's Good For The Game
Allows to check if a sticker is present on an object (which I will use
later)
Code is probably cleaner???
## Changelog
🆑
refactor: Stickers use a component and an element now to do their
sticking
/🆑
2b9bd4acad