build(playground): migrate from Create React App to Vite

[glowcloud]

Refs #4384

For the removed files in scripts, it seems that the polyfills for fs and path which were disabled by this config:

  config.resolve.fallback = {
    ...config.resolve.fallback,
    fs: false,
    path: false,
  };

should be automatically disabled by Vite. When building the project, I get this warning:

[plugin vite:resolve] Module "fs" has been externalized for browser compatibility

which should mean that the polyfills are disabled: https://vite.dev/guide/troubleshooting.html#module-externalized-for-browser-compatibility

[glowcloud]

This plugin is a replacement for this part of the previous start script:

cross-env GENERATE_SOURCEMAP=false

Using other sourcemap configs did not disable them for JS files.

Source: vitejs/vite#9825 (comment)