`supabase stop` should stop all containers

I work on several different projects on my local computer and use supabase start to start them. The problem is they consistently interfere with each other and so I have to stop one before starting another. However you must run supabase stop in the directory that you started them, which is pretty annoying. It would be nice if we could have a supabase stop --all which would stop all supabase projects running on the computer.

That way I can just set direnv to run supabase stop --all && supabase start whenever I CD into a specific directory