Implement API for retrieving and managing rulesets on a repository

[FHannes]

As far as I can tell, the library currently supports managing branch protection, but not rulesets. The use of rulesets has some advantages over using branch protection as listed in the documentation, so it might be useful to add support for them. API reference: https://docs.github.com/en/rest/repos/rules?apiVersion=2022-11-28

[biologeek]

Hi there,

If no one has currently started any work on this topic, I'm eager to develop CRUD features for rulesets.

I also need them for a project so I'll be happy to contribute !

[biologeek]

Which branch should I pull to start ?

[Haarolean]

Which branch should I pull to start ?

main is the one