Container device add/remove CLI/API documentation RFC

Device add/remove CLI and API documentation.  This is being proposed as
the new API and CLI to see how people like it.

Co-Authored-By: Chris Alfonso <calfonso@redhat.com> (github: calfonso)
Docker-DCO-1.1-Signed-off-by: Ian Main <imain@redhat.com> (github: imain)
It might also be a good time to remind people not to use ``--device`` with ephemeral devices period ;)