Add `supabase config pull` command

It's often easier for me to update project settings in the Supabase dashboard. However, if I do that, there's no easy way to automatically synchronize those updates to my local Supabase config in config.toml. Others have noted this lack of functionality, too, e.g. #22455. The Supabase CLI already has the command supabase config push to push changes from the local config to production. It'd be awesome if you added a supabase config pull command to pull changes made in the dashboard to the local config.