Announce a WPF extension for VS Code with this designer

[lextm]

More like a project for fun, but since XAML Source Generator (XSG) has been hot (Uno, MAUI, and AXSG toolset for Avalonia), I think it makes sense to also try XSG on WPF.

That produces

1. An XSG engine for WPF
2. A language server based on this XSG for WPF.
3. A protocol to push live edits from the editor to WPF designer.
4. A new VS Code extension that binds them all.

The VS Code Marketplace page is here,

https://marketplace.visualstudio.com/items?itemName=lextudio.vscode-wpf

Didn't aim to bring SharpDevelop 4 back, but at least part of it now lives with a modern editor.