Related problem

I might be getting ahead of myself, but with #12056 on the horizon, it would be nice to have generate support this feature.

Describe the solution you'd like

As mentioned in #11318 ...

> let fibGenerator = {
      |fib = [ 0,1 ]|
      {
          out: $fib.0,
          next: [$fib.1, ($fib.0 + $fib.1)]
      }
  }

> generate $fibGenerator | first 5
╭───┬───╮
│ 0 │ 0 │
│ 1 │ 1 │
│ 2 │ 1 │
│ 3 │ 2 │
│ 4 │ 3 │
╰───┴───╯

Describe alternatives you've considered

No response

Additional context and details

I believe #12083 would also be required in order for this to happen. Perhaps these should be combined, but I'm not sure - Leaving them as two requests for now.