Update schema and implement extended schema validation

[grst]

For #292, implement the following changes

• Update schema

  • rename "authors" to "contact"
  • add a field "logo" which allows to specify an image and will be used for core packages

• Implement extended validation

  • use python script on top of jsonschema
  • validate links, logos, github user IDs, pypy/conda/cran identifiers
  • Fix/remove broken github/pypi identifiers that were found that way

• Update CI to use uv

The validation code is based on the script we already had in the tutorials registry: https://github.com/scverse/scverse-tutorials

Closes #69

[Zethson]

Thank you very much!

I generally wonder whether it wouldn't be nicer to collect all failures for the validators and raise one or more errors at the end instead of failing early. Having to rerun this is annoying because of the many requests and we could bombard their API servers.

[grst]

Thanks for fixing all my typos!

[flying-sheep]

I’ll take a quick look at hammering the API a bit less, otherwise looks great!

/edit: done, at least users per project are now batched

[flying-sheep]

Errors look like this:

ValueError: palantir: Failed to validate GitHub users ['dpeerlab', 'ManuSetty', 'katosh']:
- Could not resolve to a User with the login of 'dpeerlab'.