Add MAX17048 lipo fuel gauge (#4851)

* Initial commit

* Update MAX17048Sensor.cpp

* Update EnvironmentTelemetry.cpp

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/power.h

@@ -48,6 +48,11 @@ extern INA219Sensor ina219Sensor;
 extern INA3221Sensor ina3221Sensor;
 #endif
 
+#if HAS_TELEMETRY && !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR && !defined(ARCH_PORTDUINO) && !defined(ARCH_STM32WL)
+#include "modules/Telemetry/Sensor/MAX17048Sensor.h"
+extern MAX17048Sensor max17048Sensor;
+#endif
+
 #if HAS_RAKPROT && !defined(ARCH_PORTDUINO)
 #include "../variants/rak2560/RAK9154Sensor.h"
 extern RAK9154Sensor rak9154Sensor;
@@ -82,6 +87,8 @@ class Power : private concurrency::OSThread
     bool axpChipInit();
     /// Setup a simple ADC input based battery sensor
     bool analogInit();
+    /// Setup a Lipo battery level sensor
+    bool lipoInit();
 
   private:
     // open circuit voltage lookup table