Use Firefly Zero device as a gamepad. Works with any games (and on any OS) and with firefly-emulator.

Currently, it's implemented as a standalone firmware that can flashed on the IO chip instead of firefly-io. In the production release, we plan to integrate it into the main hardware and make it launchable from firefly-launcher.

1. Install espup
2. Install task
3. espup install
4. . ~/export-esp.sh
5. Connect to the right chip on the device.
6. task flash -- --port /dev/ttyACM0