fix!: fix list type column conversion from data frame

[eitsupi]

A follow up for #1021

I was trying more complex nested type cases and learned that the columns of list class of data.frame are AsIs class and the list class is hidden.

data.frame(a = I(list(data.frame(b = 1L))))$a |> class()
#> [1] "AsIs"

^{Created on 2024-04-11 with reprex v2.1.0}

So it was necessary to add a process here to convert this column back to the list class to convert it to the Series as intended.

[etiennebacher]

Thanks, not sure if you want to merge this or #1023 first so I'll let you do that