By "VSCode" here you mean something like a HTTP API for file read/write[0] that can be used from VSCode, I think? VSCode also can be made into a web app[1], but I don't see that happening here.

[0]: https://github.com/pomdtr/smallweb-vscode/blob/main/extensio...

[1]: https://github.com/gitpod-io/openvscode-server https://github.com/coder/code-server etc