Add links (as examples) to a few repos with good READMEs

[egrace479]

It'd probably be helpful to link to a few different types of repos that have good READMEs as examples under the README section of the GitHub Repo Guide. I was thinking:

• BioCLIP 2 provides a good example for a large project
  • it has data, model, the code, and a demo
  • it builds on previous work: models how to cite, also the license is a bit more complex but handled well
  • it also is re-used a lot within Imageomics as a base style
• For a code/software-based project we could use cautious-robot, sum-buddy, or emb-explorer
  • SST also has some nice elements as paper + tool, though I generally wouldn't want to recommend including the citation in the README.
  • Andromeda points to some docs in the wiki too, perhaps a simpler example for when to add some extra pages elsewhere.

We should also make sure the GitHub Repo Guide page links out to the code checklist.

@hlapp, what do you think?