Add "Base Types" and "Derived Types" to Assembly type listing

I'm talking about this bit that you have in the WPF app:
<img width="256" height="120" alt="Image" src="https://github.com/user-attachments/assets/a8ca1e48-51a6-4a13-af89-99134e8746b4" />

It's not there in the vscode extension as far as I can tell.