Add SHELLY PLUS 1 board with support of relay, switch, BT gateway (#1349)

So that you know, the overtemperature protection is not implemented in the firmware.

main/config_GPIOInput.h

@@ -42,6 +42,10 @@ extern void GPIOInputtoMQTT();
 #  endif
 #endif
 
+#ifndef GPIO_INPUT_TYPE
+#  define GPIO_INPUT_TYPE INPUT_PULLUP
+#endif
+
 #define INPUT_GPIO_ON_VALUE  "HIGH"
 #define INPUT_GPIO_OFF_VALUE "LOW"