add gh action

[hathach]

This repo use rather old IDF v3.3.1, which can cause trouble for some to build. Although I have no issue on Linux, having gh ci build and upload bin file as commit & release artifacts is a nice addition. This will help to safe check changes.

Also take the chance to reudce firmware version duplicaiton

• combine.py extract version from CommandHandler.cpp
• make load-nina use wildcard to load bin file

[dhalbert]

Thanks!

In the long run, it would be great to generate version info automatically from the git tag, as is done here:
https://github.com/adafruit/circuitpython/blob/main/py/makeversionhdr.py

[hathach]

Thanks!

In the long run, it would be great to generate version info automatically from the git tag, as is done here: https://github.com/adafruit/circuitpython/blob/main/py/makeversionhdr.py

we can take a look at that later, though I am not sure if we could pass addtional option to arduino IDE.