The `help` module is no longer needed, since `clap` handles that.
This meant that the re-exports of each command's `ABOUT` could be removed and
the `const`s can now be private.
To get to a point of separating the users' identity from the node, then the `rad
self` command should not display information related to the node so prominently.
The relation between `rad` and `radicle-node` is really similar to that between
`rad` and SSH Agent. They communicate via socket. So, when this connection is
successful, it is printed, but not more.
There may be some re-learning for users here, but it is worth the improvement.
Note that the information being removed here is available via `rad node status`
(see previous commit).
The trait `radicle_ssh::agent::client::ClientStream` trait was
simplified, because `winpipe::WinStream` is so similar to
`std::os::unix::net::UnixStream` that we can just use the same
implementation for both platforms.
However, obtaining the process identifier of the SSH agent process is
not common on Windows, so we instead track the path that we used to
connect to the agent. This is also helpful on Unix. In some cases, the
path will even contain the process identifier. The path is printed by
`rad self`.
Errors are cleaned up, and error messages are improved.