SSH FIDO2 support

Vyos ed25519-sk ssh key support has been available for a while, and I’d like to implement FIDO2 on as many of my devices as possible.

As per the article Securing SSH with FIDO2, the following option must be set on the SSH server. This setting is currently not exposed via the CLI, and I’d like to avoid hacks that won’t survive an upgrade.

# Enforce User Verification
PubkeyAuthOptions verify-required

Is this possible today on Vyos or should I be raising a feature request?

Add a feature request and PR as well.