Add ESP32 touch sensors as button alternative (#1190)

* Add touch option to button handler

* Check if touch is pressed in setup

* Add TOUCHPIN build env and override example

Co-authored-by: Aircoookie <dev.aircoookie@gmail.com>

wled00/fcn_declare.h

@@ -21,6 +21,7 @@ void updateBlynk();
 
 //button.cpp
 void shortPressAction();
+bool isButtonPressed();
 void handleButton();
 void handleIO();