Announcing the `rustc-guide` Strike Force

The rustc-guide is the official resource for discovering how the compiler works and how to contribute to it. It has come a looong way since it was created a year and a half ago!

As a result, we now have over 70 issues on the repo, some of which have unfortunately become quite stale. The Learning Working Group is creating a Strike Force to triage these issues, determine the action items for them, and try to get some work started on them.

But we there is a lot of work! We need your help! If this sounds like an interesting way for you to contribute, please ping us in this Zulip topic.