To keep behaviour consistently under subcommands, move the `rad node
following` behaviour under `rad follow`. When an `<nid>` isn't
provided then the followed nodes are listed.
This includes filtering by alias, when `--alias` is used.
Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett
Split the commands and change the naming.
* Tracking a repo is now called "seeding"
* Tracking a peer is now called "following"
In this commit, we don't change most of the internal code, only the
user-facing part.