* Added definitions for various parameters and UI types.

* Overload for `const char*` added.

* Function `addValidStrList` added.
This is needed for mode parameters (see example RMakerCustomAirCooler.ino).

* Example of a custom device that uses toggle, mode and range parameters.

* Revert: Added definitions for various parameters and UI types.

* Fixed declaration for addValidStrList

* Fixed missing gpio definition for ESP32C3 target

Co-authored-by: Me No Dev <[email protected]>