Auto add project reference based on path

This tool seems like its perfect for exploratory testing of projects or doing quick experiments to test out an in development feature.

To smooth over that use case, I think it would be valuable to automatically (or with a magic command) add a project reference to whatever project is in the current path. An initial version of this could be to just do a quick check on startup if there is a csproj file in the current directory and just reference it.

Some possible issues:
- Maybe the project would have to be built first? I don't know how this system handles referencing csproj files.
- The .net version likely has to match up. This could be fixed by just trying and silently failing (or with a quick message explaining the problem)