Automatically add issues to current project

[slifty]

We use GitHub Projects to keep track of our issues, but right now those issues need to be manually added to the project for it to appear on the board.

This definitely isn't ideal!

I've found the following reasonable paths:

1. GitHub Projects provide a workflow to auto-add on issue creation, but the free tier will only support a single repository which is obnoxious.

2. GitHub Actions could provide a solution (e.g. a cron that runs in the .github repository ever X minutes) , but it would require the creation and use of a Personal Access Token (not the end of the world, but also obnoxious!) If we do this we could use https://github.com/actions/add-to-project

3. We could have a script we run manually, though I think this would just be a more manual + bespoke version of the Actions solution.