Add CITATION.cff files
Saw this today at xarray's repo. Supported by GitHub, Zenodo and Zotero. So it would be good to have.
- https://citation-file-format.github.io/
- https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-citation-files
Tools to generate them: