Add Melexis Contact-less Infrared Sensor - MLX90614 to Heltec V3 Sensor

src/helpers/sensors/EnvironmentSensorManager.h

@@ -15,6 +15,7 @@ protected:
   bool INA219_initialized = false;
   bool SHTC3_initialized = false;
   bool LPS22HB_initialized = false;
+  bool MLX90614_initialized = false;
 
   bool gps_detected = false;
   bool gps_active = false;