VBUS voltage monitoring is mandated by USB specification for self-powered devices.
This implementation maps selected GPIO to bvalid signal of USB-OTG peripheral.
Closes https://github.com/espressif/esp-idf/issues/7747
tusb: cdc, tasks encapsulation, callbacks api, multiple interfaces
examples: added serial interface and usb console
ci: reimplemented cmake/make test in python with ignore lists
IDF-578