get_user_info needs pagination

[JBGruber]

It looks like there is a limit how many actors can go into the get_user_info function. Below 26 is fine, but then:

library(atrrr)
df <- search_post("Amsterdam", limit = 200)
#> ℹ Found an *unknown total* of posts that fit the query
#> ⠙ Got 97 posts, but there is more.. [1.2s]
#> ⠹ Got 192 posts, but there is more.. [1.6s]
#> ⠸ Got 285 posts, but there is more.. [1.9s]
#> ℹ Parsing 285 results.
#> ✔ Got 285 results. All done!
#> 
user_info <- get_user_info(actor = df$author_handle)
#> Error in `httr2::req_perform()` at atrrr/R/utils.r:57:5:
#> ! HTTP 400 Bad Request.
#> • error type: InvalidRequest
#> • message: Error: actors must not have more than 25 elements

^{Created on 2024-02-13 with reprex v2.1.0}

We should fix this, since we take care of pagination elsewhere (e.g., in search_post). So why not here.