Fix VEML7700Sensor readings and update protobuf and MQTT JSON

src/modules/Telemetry/Sensor/VEML7700Sensor.h

@@ -5,7 +5,12 @@
 class VEML7700Sensor : public TelemetrySensor
 {
   private:
+    const float MAX_RES = 0.0036;
+    const float GAIN_MAX = 2;
+    const float IT_MAX = 800;
     Adafruit_VEML7700 veml7700;
+    float computeLux(uint16_t rawALS, bool corrected);
+    float getResolution(void);
 
   protected:
     virtual void setup() override;