dfr collect for lazyframe

Collect lazy dataframe into eager dataframe.

Signature

> dfr collect

Examples

drop duplicates

> [[a b]; [1 2] [3 4]] | dfr into-lazy | dfr collect
╭───┬───┬───╮
│ # │ a │ b │
├───┼───┼───┤
│ 0 │ 1 │ 2 │
│ 1 │ 3 │ 4 │
╰───┴───┴───╯