The configuration of the fetch process was only achieved at the setup
of the of the node.
This limits the ability to pass configuration options to the fetch
worker while the node service is running.
This change introduces `radicle_protocol::fetcher::state::FetchConfig`
to allow configuration options to be kept track of. This includes the
previous `timeout` option, but now also includes the
`radicle_fetch::Config`.
The service now produces the `FetchConfig` and passes it through to
the fetch worker.
Mostly changes of `use`s and moving components to `radicle-protocol`,
with the goal of just getting `radicle-node` to work on top of the new
`radicle-protocol` crate.
Fintan Halpenny
Lorenz Leutgeb