Make win32-openssh compatible with AD auth via public key

[Nova-Logic]

Summary of the new feature / enhancement

I am developing an API for managing windows hosts. due to lack of ability to auth on managed hosts via public key with proper AD net session it introduce a lot of pain for making job done, and also making management of win hosts from linux very hard, since a lot of PowerShell cmdlets rely on network session.

Proposed technical implementation details (optional)

Implement an win32-openssh plugin that would
That would be beneficial for developers, who are trying to use System.management.automation and sshconnectioninfo since PowerShell core team does not support password or other forms of auth for the sshconnections that would be able to achieve that goal.

[mgkuhn]

What would this enable that isn't already enabled by the existing Kerberos/GSSAPI authentication support? (I routinely manage Windows hosts from Linux via GSSAPI authentication and delegation (ssh -K) and it works very well.)