add method
Adds a new worker to the pool and starts it.
Optionally specify a tag for the new worker.
Implementation
Future<void> add({String? tag}) async {
tag ??= 'worker_${_workers.length + 1}';
final worker = IsolateWorker(tag: tag, useLogger: useLogger);
await worker.start();
_workers.add(worker);
if (_workers.length == 1) {
_next = 0;
}
_eventController.add(IsolateWorkerPoolEvent(IsolateWorkerPoolEventType.add, worker._tag));
}