Migrating GHC's real-time communications to Matrix? (#24010)

Hello all, GHC's user and contributor documentation currently directs users to #ghc on irc.libera.chat for discussion of GHC development. However, for a variety of reasons the center-of-mass of discussion has been gradually shifting towards Matrix (#GHC:matrix.org). Given that Matrix appears to be both more active and more accessible to newcomers, I suggest that we recognize this shift in our documentation. If you agree or disagree with this proposal please leave a :thumbsup: or :thumbsdown: on [#24010] and feel free to leave a comment explaining your feelings. Cheers, - Ben [#24010]: https://gitlab.haskell.org/ghc/ghc/-/issues/24010