XAML files are part of a miscellaneous workspace rather than actual C# workspace

[etvorun]

Version Used: 4.1100.24.20901

Steps to Reproduce:

1. Install VS Code.
2. Install C# DevKit extension.
3. Create MAUI app and open it in VS Code.
4. Start debugging LSP process.
5. Set breakpoint in workspace change notification code.
6. In VS Code open any *.xaml file - e.g. MainPage.xaml - and make any changes.

Expected Behavior:
Workspace where *.xaml document changes occur is a C# workspace

Actual Behavior:
Workspace where *.xaml document changes occur is a miscellaneous workspace, a.k.a. one used for lose files.