Describe the feature or problem you’d like to solve

Enable users to manage a repo's Projects via the API.

Proposed solution

It will make GitHub's project management capabilities many times more accessible.

Additional context

It's simply a case of implementing the GraqhQL queries that are already available: https://docs.github.com/en/issues/planning-and-tracking-with-projects/automating-your-project/using-the-api-to-manage-projects