Fixed WsClient forever retrying to initialize() issue

[oliverbytes]

Closes #1

This added a max retry feature where it returns false when it reaches the maximum retries.

Also added a setConfig() function for WsClient and set optional default values. Example usage for setConfig() below

final zenon = Zenon();

zenon.wsClient.setConfig(
      url: 'ws://peers.zenon.network:35998',
      maxRestarts: 5,
      maxTimeouts: 5,
      pingIntervalDuration: const Duration(seconds: 5),
      timeoutDuration: const Duration(seconds: 5),
      restartDelayDuration: const Duration(seconds: 5),
);