geo: Moved the map_projection_* functions and state into a self-contained C++ class

src/modules/simulator/simulator.h

@@ -264,7 +264,7 @@ private:
 	uORB::Subscription _vehicle_command_sub{ORB_ID(vehicle_command)};
 
 	// hil map_ref data
-	map_projection_reference_s	_global_local_proj_ref{};
+	MapProjection	_global_local_proj_ref{};
 	float						_global_local_alt0{NAN};
 
 	vehicle_status_s _vehicle_status{};