Add option to gpo_collections() to split bill text version into separate column

[blackerby]

When calling a function like the following, it would be nice to have an option to create an additional factor column for bill text version. It could be named bill_text_version and would contain data like ih, rh, etc.

gpo_collections(collection = "BILLS", start_date = "2024-02-17T00:00:00Z")
#> # A tibble: 29 × 7
#>    package_id          last_modified       package_link doc_class title congress
#>    <chr>               <dttm>              <chr>        <fct>     <chr>    <int>
#>  1 BILLS-118hr7278ih   2024-02-17 05:46:41 https://api… hr        Hous…      118
#>  2 BILLS-118hr7275ih   2024-02-17 05:46:41 https://api… hr        Comp…      118
#>  3 BILLS-118hr7288ih   2024-02-17 05:46:31 https://api… hr        Arme…      118
#>  4 BILLS-118hr7287ih   2024-02-17 05:46:31 https://api… hr        Coun…      118
#>  5 BILLS-118hr7286ih   2024-02-17 05:46:31 https://api… hr        Gene…      118
#>  6 BILLS-118hr7277ih   2024-02-17 05:46:26 https://api… hr        Halt…      118
#>  7 BILLS-118hr7276ih   2024-02-17 05:46:25 https://api… hr        Tele…      118
#>  8 BILLS-118hr7274ih   2024-02-17 05:46:25 https://api… hr        Conn…      118
#>  9 BILLS-118hr6544rh   2024-02-17 05:44:35 https://api… hr        Atom…      118
#> 10 BILLS-118hres1021ih 2024-02-17 05:44:30 https://api… hres      Prov…      118
#> # ℹ 19 more rows
#> # ℹ 1 more variable: date_issued <date>