Microsoft sign-in isn't set up yet

The "Sign in with Microsoft" button is wired up, but the three Azure credentials haven't been added to the cockpit's environment yet.

To enable it, follow docs/MICROSOFT_ENTRA_SSO.md — about 10 minutes in the Entra portal, then paste MICROSOFT_TENANT_ID, MICROSOFT_CLIENT_ID, and MICROSOFT_CLIENT_SECRET into the console daemon's plist and restart it.

In the meantime, email + password sign-in works normally.