Make github actions required

Tide's `unknow_contexts` is a bit strange. The following are some other options we could use and set them to required in branch protections rules so that tide respects them.

https://github.com/WyriHaximus/github-action-wait-for-status
https://github.com/re-actors/alls-green

Start by reviewing Tide's `unknow_contexts` behavior and the two linked GitHub Actions. Determine which status checks can be required in branch protection rules; done means the chosen checks are required and Tide respects them.

Written by the indexing model from the issue text.