Consider adding option to the data download script to list files

> Noting that I guess in the future we might consider adding an option to the download script to list projects and/or libraries in a current release?

_Originally posted by @sjspielman in https://github.com/AlexsLemonade/OpenScPCA-analysis/issues/161#issuecomment-2096579502_

Locate the data download script and first read how it handles the current release. Determine whether the requested option should list files, projects, or libraries, then confirm the expected listing behavior with the issue context. Done means the script provides a documented option that produces the agreed listing.

Written by the indexing model from the issue text.