Repository Management Scripting

[BenjamenMeyer]

It would be highly useful to add some automation around the repository management:

• uniform set of labels across all repositories in the org
• uniform set of milestones across all repositories in the org
• single place to apply uniform branch protection rules

GitHub provides the gh command-line tool which can do some of these things, but not all.
There is API documentation (https://docs.github.com/en/rest) for GitHub for doing all the things.
We probably want a mix, so we can rely on gh or a provided SDK as much as possible and then use the API directly where we can't.

It may be possible to do this via Ansible; we'd likely have to write the entire Ansible module though.

[BenjamenMeyer]

As we need to get 0.7.x and 0.8.x out the door, assigning this to the 0.9.x project/milestone when we'll have more time to look at it.