PocketID now requires to explicitly include the `openid` scope in the `scopes` list. PocketID will strictly block user information queries with a `403 Forbidden` if this scope is missing.
Move the docs.olivetin.app AsciiDoc component into this repository, add
local Antora playbooks for contributors and CI, and document the split
between this repo and the docs build repository.
Co-authored-by: Cursor <cursoragent@cursor.com>