Launch the OSF app: enter an OSF user or project ID, search and tick the
projects you want, then download them with osf_file_download().
Details
Listing a user's projects uses osf_user_projects(), and a single project
ID is shown as a one-row list so both routes end in the same place. Private
projects need a token, which is entered in the app and set for that session
only with osf_pat().
