This changes all "coder workspace *" commands to root.
A few of these were already at the root, like SSH. The
inconsistency made for a confusing experience.
Workspace commands will be aliased at the top-level, so
"start" would easily be confused with starting a workspace.
Server seems like a more appropriate name too.
It's helpful for us Coders to align on a common set of style
guidelines. While I'd prefer to automate this, documentation
should get us a lot of the way there!
Please review these thoroughly, as PRs will be checked against it
after merge.
