Pybricks Code interface for EV3Brick

[dlech]

This was discussed in https://github.com/orgs/pybricks/discussions/2126

Work on this is finally underway so creating a proper issue to track it since the discussion isn't easy to find.

• USB download and run
• UI to restore official LEGO firmware
• UI to flash Pybricks firmware
  (UI is not 100% complete, still needs video and proper error messages)
• Template file for EV3
• Implement custom hub name for EV3
• Code completion for EV3
• Package EV3 firmware (this is blocked by a few firmware items we need to take care of first: low battery shutdown and proper license file)

[afarago]

Taking forward the work that @dlech already did, I played around and added a few changes.
❤️ 🤖 With these changes it seem to work.

Hope that helps your awesome efforts!

One key change: eventually the send command finishes before the race condition fires, so I added a forwardTask, but there might be better solutions.
https://github.com/pybricks/pybricks-code/blob/master/src/firmware/sagas.ts#L1121-L1130