Send keystrokes via USB as well

[garubi]

If PushPush is connected vi USB to a computer etc... send the keystrokes not only via bluethoot but only via USB cable

[garubi]

https://github.com/chegewara/esp32-usb-v2 <-- Not maintained and maybe not running
https://github.com/chegewara/EspTinyUSB <-- Older but probably ok