Describe the feature or problem you’d like to solve

Since its announcement almost two months ago, feedback on https://github.com/github/gh-projects has been positive (suggesting this is a valuable feature set for users) and the interface has pretty stable.

In talking with @mislav, this feels like the right time to attempt to import gh-projects into gh 🎉

Proposed solution

Projects is an important product for GitHub, and what better way to show ❤️ than by becoming a first class part of the GitHub CLI.

Since gh-projects was built around https://github.com/cli/go-gh I believe this will be a fairly simple import 🤞 .

To make things even easier, let's copy the code and make a fresh git commit in this repo, avoiding any potential for conflicts. The git history in gh-projects can remain as is, and a new git history can start here.

For consistency with existing CLI commands, the imported command will be called project, with an alias of projects for compatibility.

Additional context