Github integration

[patrickleboutillier]

It would great if we could point Wokwi to a github repo to load the code from there, and then commit the changes.

Developping on Wokwi is really faster than on a real device, but copying the code back and forth between Wokwi and the Arduino IDE to try in out on a real device can be a pain, especially for largeer projects with multiple files.

If Wokwi could read/write code to a GH repo it would be really helpful.