Description of the new feature/enhancement

If an application reports progress via OSC 9;4, Windows Terminal nowadays shows that in the task bar and in the tab header (https://github.com/microsoft/terminal/pull/8133). However, if the progress report has the error or warning state, that information goes only to the task bar. I'd like the tab header to display the error or warning, too.

Related to https://github.com/microsoft/terminal/issues/6700 and https://github.com/microsoft/terminal/issues/9435#issuecomment-796667902.

Proposed technical implementation details (optional)

Could perhaps change the color of the progress ring. I don't see any color or error property in Microsoft.UI.Xaml.Controls.ProgressRing, though.