The prior change for adding rich updated only those places that were

necessary to remove old dependencies like colorama or texttable.

This change does the rest of the work, updating commands with better

output throughout.
This also includes some fixes for things found along the way:

Improve rbt close to allow using newer "completed" string instead of

  "submitted"
Fix key fetching in rbt install to use full key hash in

gpg --recv-keys because otherwise it fails.
Fixed up some comments and type annotation issues.

Ran unit tests.
Tested the output of each changed command in both color and no-color

  modes.