Add Motor, Regulator, add velocity reg. messages

Merge pull request #37 from RoboticsBrno/piezo Implement buzzer

Implement buzzer

Implement Esp32 watchdog

Merge pull request #34 from RoboticsBrno/poweroff Implement power off button

Do not hang forever when shutdown is called with USB connected

Power-off after 2 seconds of holding BOFF

Implement power off button

hw: change size of holes for USBC connector - library `USB.lbr` - footprint `USB_C_8PIN` - change holes size from 0.35 mm to 0.30 mm to fit JLCPCB requirements

hw: improve silkscreen texts