Azure Active Directory / Entra ID support

[skoya]

Is your feature request related to a problem? Please describe.
I host my fitnesse behind a company firewall. The company has disabled basic authentication in the browsers so we can no longer use the password file. Would it be possible to support Azure Active Directory / Entra ID?

Describe the solution you'd like
Some sort of plugin or native support an related hooks to enable azure authentication.

Describe alternatives you've considered
Other auth mechanisms are now very old (yes in some cases older than fitnesse :-) ). If we can bring it up-to-date with AAD then auditing, access controls etc become a lot easier.

Additional context
Add any other context or screenshots about the feature request here.