See if code-server works

I have a crazy idea: run a native VSCode on iPad. Of course, now `vim` can’t satisfy me, although it performs greatly (why it looks fking ugly #592)

To run a vs code on an Android device, we either let Aid Learning do it automatically or do the three steps on Termux:

- Run Node.js on the complete Linux layer
- Download and run `code-server`
- Open an URL like `192.168.0.3:9999` on the browser

So far I am concerned about whether `node.js` works. If everything goes well, I'll try to cross-compile it. If you can have a built-in interface like Blink Code?