Add function for get publication details

[cjrace]

We have an endpoint that gets a publications details in EES, so we should add a wrapper function for it.

Expect main argument to be publication_id, with api version / environment etc also in there but with defaults set.

Example JSON ouput

{
  "id": "d851c09e-7f5a-4750-9191-ed67ba5e8f8b",
  "title": "Pupil absence in schools in England",
  "slug": "pupil-absence-in-schools-in-england",
  "summary": "Summary of the publication.",
  "lastPublished": "2024-06-01T09:30:00+00:00"
}

Assume we could give a simple data frame of this that is transposed for readability (e.g. where id / title etc should be cols, we use them as rows so it prints neatly into the console)