Clarify discourse vs. github vs. internal dev forum

Right now we have, afaik:

  1. irc (mentioned here https://github.com/beetbox/beets/blob/9bab200d3d496968bf517151ca43a91b0aafc26a/docs/faq.rst )
  2. internal dev chat (gitter)
  3. github discussions
  4. github issues
  5. discourse

For a project that has <10 active discuss-ers in any given week, this is absurd. I don’t want to have to check a bunch of places to keep up with discussions. In particular, I think a ‘public’ IRC should be retired, since it’s near impossible to search for future generations.

I also think we should poll the community on Discussions vs. Discourse and retire the one that is less desired.

Thus:

  1. internal dev chat (gitter)
  2. discourse or github discussions
  3. github issues

I also have a suggestion to not use Issues for anything but narrowly defined bug reports or feature development. (Think Agile if you’re familiar.) If you aren’t involved with beets development then you wouldn’t need to check issues either. That would leave just discourse or discussions as your one-stop-shop as an end user.