Microphone toggle button for Zoom and Hangouts clients using M5Atom and BLE

• Runs on M5Atom Matrix
• Acts as a BLE keyboard using ESP32-BLE-Keyboard by T-vK
• Sends <Alt+a> to toggle mic during a call in Zoom client
• Sends <Ctrl-d> to toggle mic in Hangouts client
• Keep button pressed on boot to enable Hangouts mode, default is Zoom

Demo: