Add monorepo support

[aexvir]

We do have some monorepos, that right now we just treat as different services with the same codebase, which is not ideal.

It would be nice if we could specify a path inside repositories, and treat that like a separate repository, regarding auditing issues, schema scanning, etc.

It would have to be done in a smart-ish way, as some resources could be shared, like the .gitlab-ci.yml file