Add GitHub Actions workflow for Jekyll site build and deploy

[pkalita-lbl]

Fixes #507

Summary

• Add a GitHub Actions workflow (.github/workflows/deploy.yaml) which fetches the latest GO REF data (make _data/gorefs.yaml) and then builds and deploys the Jekyll site.
• Add the vendor directory which is created by the ruby/setup-ruby action (https://github.com/ruby/setup-ruby?tab=readme-ov-file#bundle-config) to the exclude list in the Jekyll config.
• Remove a URL hash from the redirect_from in _docs/taxon-constraints.md. I don't really understand how this was working before in the automatic Jekyll build provided by GitHub Pages. This hash caused the build to fail for me locally as well as when I tested this deployment in a fork: https://github.com/pkalita-lbl/geneontology.github.io/actions/runs/8302393139/job/22724573998#step:6:373

Comments

Just before merging this we will need to update this repo's settings to change the GitHub Pages build and deploy source to GitHub Actions. I don't have permission to make that change in this repo. Maybe @kltm can do it. Here's a screenshot of the correct setting in my test fork:

[kltm]

@pkalita-lbl You should now have permissions to make the changes you need.

[pkalita-lbl]

Does there need to be an update in end-user (i.e. for curators and non-technical "site maintainers") docs?

I don't think so. From a user/editor/maintainer perspective the site will build and redeploy on pushes to master just like it used to.

You should now have permissions to make the changes you need.

Yes I do! I will take care of the settings before merging.