plugin discoverability is bad

while there's the docs page, beyond that it's really the wild west out here - today I searched github for "llm install -e '.[test]'". Lots of other unrelated projects come up if you search pypi and github in most sensible-seeming ways (ie "llm-"). examples of things i wish i knew about earlier include llm-cmds which is an active fork the author hasnt published elsewhere for whatever reason, and llm-jupyter. They dont all make PRs here either. half of Simon's repos are data scraping, surely this is doable.

Start with the existing docs page and the examples named in the issue, including llm-cmds and llm-jupyter. Define an inventory of relevant plugins and how it should stay current; done means users can discover these projects without relying on broad GitHub or PyPI searches.