add option to restart device if no ble beacons received

NukiWrapper.h

@@ -59,6 +59,7 @@ private:
     int _intervalBattery = 0; // seconds
     int _intervalConfig = 60 * 60; // seconds
     int _intervalKeypad = 0; // seconds
+    int _restartBeaconTimeout = 0; // seconds
     bool _publishAuthData = false;
     bool _clearAuthData = false;
     std::vector<uint16_t> _keypadCodeIds;