Improved GPS Settings app and GPS service (#222)

- Fixes and improvements to `GpsSettings` app, `GpsDevice` and `GpsService`
- Implemented location/GPS statusbar icon
- Added app icon
- Added support for other GPS models (based on Meshtastic code)

TactilityHeadless/Private/Tactility/hal/gps/GpsInit.h

@@ -11,4 +11,9 @@ namespace tt::hal::gps {
  */
 bool init(const std::vector<GpsDevice::Configuration>& configurations);
 
+/**
+ * Init sequence on UART for a specific GPS model.
+ */
+bool init(uart_port_t port, GpsModel type);
+
 }