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.
This change better separates the different errors that can occur during an
upload. It does this by:
- Separating the authorization error into its own enum and having a variant
simply for that
- The `PacketLine` error was never constructed, so the error returned from the
`upload_pack::pktline::git_request` is now wrapped in this variant.
- The error from `upload_pack::upload_pack` is now wrapped in an `UploadPack`
variant.
- The `Io` variant is removed.
- Other redundant variants are also removed.
Matthias Beyer
Lorenz Leutgeb
Fintan Halpenny