Add start of music appliction

src/SystemTask/SystemTask.h

@@ -35,6 +35,8 @@ namespace Pinetime {
 
         void OnIdle();
 
+        Pinetime::Controllers::NimbleController& nimble() {return nimbleController;};
+
       private:
         TaskHandle_t taskHandle;
 
@@ -74,4 +76,4 @@ namespace Pinetime {
         void GoToRunning();
     };
   }
-}
+}