NewWorker creates a new worker ```go worker, err := NewWorker( WithRedisAddress("localhost:6379"), WithConcurrencyFactor(10), ) if err != nil { return err } defer worker.Stop() // start the worker asynchronously in another go routine go worker.Start() ```.

WithConcurrencyFactor sets the concurrency factor.

WithInstrumentationClient sets the instrumentation client.

WithRedisAddress sets the redis address.

WithTaskHandler sets the task handler.

`type Worker struct` is defining a new struct type called `Worker`.

Option is a function that configures a worker.