start method
Starts the STOMP server
Implementation
Future<void> start() async {
if (_isRunning) {
throw const StompStateException('Server already running', 'running', 'stopped');
}
// Register stream handler
_host.setStreamHandler(StompProtocols.stomp, _handleNewConnection);
_isRunning = true;
_logger.info('STOMP server started on ${_host.id}');
}