What are those native binaries? I know that VSCode ships with ripgrep, but that's the limit of my knowledge. Those binaries probably could be compiled to WASM to make VSCode fully run in a browser too.
Additionally the ability to say.. start a web server and run it? The ability to run the actual generated binaries from any of those other languages?
You could trivially had those with VSCode in the browser. They just run on a remote build/CI/CD environment.