Built-In Battery Voltage Monitoring

[WarmChocolateCake]

Is your feature request related to a problem? Please describe.

I noticed that some (ie Wimos) dev boards have a battery voltage divider already on the board, which simplifies requests like Battery voltage sensor #157

Describe the solution you'd like

Could a UI setting be configured to allow a voltage pin to be selected?

It would also need a scaling multiplier (similar to the temperature sensor settings) as the voltage divider roughly measures half the battery voltage.

Describe alternatives you've considered

Using another sensor ie temperature DHT11 or DS18B20 - but they're either 1-wire (digital) or I2C.

This would need to be an analog value

Additional context

Wemos ESP32-C3 Pico Dev Board - refer to ADC pin A3