effects/github-releases: needed functionality

Be able to "update" a previous release with the same tag as the current one. This is useful when you want to keep the same tag but update the uploaded assets. Here's an attempt on how It should work: https://github.com/Kranzes/hercules-ci-effects/commit/be649c957df8cd3c12e2f050062243176cd8d897
Make hercules-ci.github-releases a submodule so you can deploy multiple releases from the same flake
Make an option to set the release title, context: gh release has the --title flag
Expose a read-only option that has the value of all the files in the file spec, (List of attrs with label/path)

hercules-ci / hercules-ci-effects