Function iterator

iterator<V>(source, options?): Reactive<V>
Creates a readable reactive based on a (async)generator or iterator
```
// Generator a random value every 5 seconds
const valuesOverTime = Flow.interval(() => Math.random(), 5000);
// Wrap the generator
const r = Rx.From.iterator(time);
// Get notified when there is a new value
r.onValue(v => {
  console.log(v);
});
```
Awaiting values could potentially hang code. Thus there is a readTimeout, the maximum time to wait for a value from the generator. Default: 5 minutes. If signal is given, this will also cancel waiting for the value.
Type Parameters
- V
Parameters
- source:
      | IterableIterator<V>
      | V[]
      | AsyncIterableIterator<V>
      | Generator<V, any, unknown>
      | AsyncGenerator<V, any, unknown>
- options: Partial<GeneratorOptions> = {}
Returns Reactive<V>