New endpoint on `PUT api/v1/node/policies/repos/:rid` and `DELETE api/v1/node/policies/repos/:rid`,
that allows to track and untrack a project.
For tracking a project we also accept `?from=<nid>` to specify
where we should fetch from after tracking a repo.
This allows us in the web client to show and let user copy the node id
together with the correct port number
Signed-off-by: Sebastian Martinez <me@sebastinez.dev>