add vctrs methods to make rectangling nicer

[tanho63]

Closes #161, resurrects #201 (got closed accidentally) as part of tidy dev day:

Adds vctrs methods provided by @DavisVaughan to help gh_response play more nicely with vctrs rectangling toolkit.

Test instructions:

pkgload::load_all()
x <- gh("/users", .limit = 2)
Sys.sleep(1)
y <- gh("/users", .limit = 2)

str(vctrs::vec_c(x, y), list.len = 3)
# List of 4
#  $ :List of 19
#   ..$ login              : chr "mojombo"
#   ..$ id                 : int 1
#   ..$ node_id            : chr "MDQ6VXNlcjE="
#   .. [list output truncated]
#  $ :List of 19
#   ..$ login              : chr "defunkt"
#   ..$ id                 : int 2
#   ..$ node_id            : chr "MDQ6VXNlcjI="
#   .. [list output truncated]
#  $ :List of 19
#   ..$ login              : chr "mojombo"
#   ..$ id                 : int 1
#   ..$ node_id            : chr "MDQ6VXNlcjE="
#   .. [list output truncated]
#   [list output truncated]

list(x, y) |> 
  tibble::tibble() |> 
  tidyr::unnest_longer(1)
# # A tibble: 4 × 1
#   `list(x, y)`     
#   <list>           
# 1 <named list [19]>
# 2 <named list [19]>
# 3 <named list [19]>
# 4 <named list [19]>

[lionel-]

👍

[lionel-]

Here and below: exportS3Method uses delayed method registration. I think we need a regular export here: @export.

[tanho63]

Got it, thanks!

[tanho63]

@lionel- I'm getting an error here with a normal @export because we don't import the generic vec_ptype2 (or maybe because we don't export it?). I think delayed might be better (and make vctrs a suggests)?

https://github.com/r-lib/gh/actions/runs/17863952750/job/50801557570?pr=226#step:6:181

[lionel-]

oh you're right!

[lionel-]

Could you please revert the air formatting commit? PRs should be focused on one thing so they are easier to evaluate by the reviewer. An air format commit should be its own PR.

[lionel-]

Thank you!