Smoothie Board: https://github.com/freerouting/freerouting/blob/master/tests/Issue145-smoothieboard.dsn
Upload to DSN Viewer: https://dsn.tscircuit.com/

This is probably a pretty hard multi-step issue. Make sure to download freerouting to make sure the snapshot resembles the DSN file.

In addition to the bounty, we will likely tip for steps along the way because doing it in one big PR may be counter-productive.

/bounty $70