st×tic

Tested via Bluetooth with a G915 keyboard swapping to and from LIGHTSPEED and Bluetooth.

This PR adds the correct behavior of reading past the then-called `end_frame`, which is actually where interpolation ends on higher rates. Extra samples past `interp_last` are read directly, so some...

Duplicate that fixes whatever I just did in #10. Reimplements networking, makes some changes to the renderer, and adds some debug button combos.