Document repositories maintained by the T-compiler

[apiraino]

There was a discussion on Zulip a while ago about "what happens when one becomes a team member". One of the confusing things was (at least in my experience) that one gains write permissions on a number of git repositories under the organization umbrella without being able to understand what they are.

So, following a suggestion of @jieyouxu (hey 👋 ), I thought about a page trying to add a bit of context for the repositories we maintain, see this list.

Content and wording of this page are open to discussion. happy to get suggestions especially from people who know more about these repos :)

Rendered

[rustbot]

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[lcnr]

r? @jieyouxu