Allow use cases where list of `projects` or `organizations` is already known

[meltanolabs]

Allow use cases where list of `projects` or `organizations` is already known

[laurentS]

I got started on repositories this afternoon (EU time).

[aaronsteers]

@laurentS - Fantastic! Thanks!

[aaronsteers]

@laurentS - Thanks for your work adding repositories as a top-level config setting in #7. For the organizations use case, do you think you could add one of the sample queries you shared with me into the Readme? It occured to me that we could solve this use case by simply making it straightforward on how to query for everything under a specific org - and relying on the existing search-oriented features for that use case.

What do you think?

[aaronsteers]

Closing this as resolved. Repositories is now supported as a config option, and organizations can be supported via a search using Github query syntax to include only the requested org(s).