Arcade Button Handle (28mm)

* Based on @mariorosas design (https://www.thingiverse.com/thing:3497960)

This is a handle I made for my kids to play with OpenLedRace :)

I made 3 main changes to the original design:
* Reduce the border thickness
* Add a small notch under the button to easily remove it if needed ([the one I bought fits super tightly](https://amzn.to/31xXyVH), so I needed a solution to avoid damaging the button or the handle)
* Move the wire hole to the back (so my kids can hold it firmly on the table with one hand, and use the other one to frenetically push it with the other's palm)