Grant workflow contents: write and packages: read permissions.
Add GitHub and Gitea release actions to publish thesis and proposal
PDFs as the 'latest' release on push.
Add server_url conditionals to dispatch builds to a GitHub
specific job and a Gitea-specific job. Add TeX Live caching,
checkout and bibtex handling in the Gitea job. Use appropriate
upload-artifact action versions for each platform.
soconnor