Implement transform.divide()

Divide the elements of the iterable evenly into n smaller iterables, maintaining order. Ex: ([1, 2, 3, 4], 2) => [1, 2], [3, 4]

```
function *divide<T>(data: Iterable<T> | Iterator<T>, n: number): Iterable<Array<T>>
```

Needs to be implemented:
* `transform.divide()`
* `transform.divideAsync()`
* `Stream.divide()`
* `AsyncStream.divide()`
