In interactive (user) contexts, use `try_sign` instead of `sign`.
We also revisit the `Profile` by adding a `signer` method that can
fail, eg. if we couldn't connect to ssh-agent.
Finally, we replace `UnsafeSigner` with `MemorySigner`, which makes
use of `ssh::Keystore`.
Signed-off-by: Alexis Sellier <alexis@radicle.xyz>
Armored signatures are used by Git for signing commits. Support reading
writing these signatures by implementing a new trait to read and write
to the SSH formmat.
Signed-off-by: Slack Coder <slackcoder@server.ky>
Alexis Sellier
Slack Coder