Add GPS functionality: implement GPS_Init, GPS_Read, and GPS coordinate retrieval; update includes and platform dependencies

hardware/include/GPS.hpp

@@ -1,8 +1,9 @@
 #define RX 4
 #define TX 5
 
-#include "SoftwareSerial.h"
+#include "TinyGPSPlus.h"
 
 void GPS_Init();
 void GPS_Read();
-String GPS_Data();
+float GPS_longitud();
+float GPS_latitud();