🛠 Repo: Add a bot to automatically close stale "waiting for author" issues

[mark-wiemer]

Tooling Suggestion Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have read and agree to Mocha's Code of Conduct and Contributing Guidelines
• I have searched for related issues and issues with the faq label, but none matched my issue.
• I want to provide a PR to resolve this

Overview

As we continue through the backlog, we're bound to find more issues that have been "waiting for author" for weeks, months, maybe years. To be more objective and lower the maintenance burden, we should have an automated bot that:

• Comments on issues with label "status: waiting for author" after two weeks of inactivity, asking the author to followup
• Closes those same issues after two more weeks of inactivity
• Only acts on issues with label "status: waiting for author". If that label is removed, even after a bot comment, the bot no longer acts on that issue
  • Timer is reset for every non-bot comment on the issue

Maintainers will follow these issues as well and be notified in case anything changes. Maintainers can remove the "status: waiting for author" label to keep the issue open indefinitely

Additional Info

Yay I get to learn about GitHub automation :)

[JoshuaKGoldberg]

👍 anything that saves us time having to do manual tasks!