Support development with WSL

[dschaefer]

I'm finding using cdt-vscode from a WSL project where I'm using Linux to do cross gcc build (which is much easier/faster than doing it from native Windows) to be very laggy. While you can run an X server like MobaXterm on the Windows side and project from the WSL side, and it works, it's not a great experience.

VS Code has the concept of remote workspaces. I don't think I've seen anyone use them but a workspace folder can have a URL with a custom schema. We should be able to launch clangd inside WSL to do the language services, and launch builds and debug inside there too. It would be a good showcase of our abilities. And then of course, we should make the Eclipse C++ IDE do this using the same techniques.