Added default temperature from ESP32 MCU and NRF52 MCU

Added NRF52Board.h and NRF52Board.cpp
Modified NRF52 variants to extend from NRF52Board to share common feature

variants/wio_wm1110/WioWM1110Board.h

@@ -2,6 +2,7 @@
 
 #include <MeshCore.h>
 #include <Arduino.h>
+#include <helpers/NRF52Board.h>
 
 #ifdef WIO_WM1110
 
@@ -10,7 +11,7 @@
 #endif
 #define Serial Serial1
 
-class WioWM1110Board : public mesh::MainBoard {
+class WioWM1110Board : public NRF52Board {
 protected:
   uint8_t startup_reason;