I'm developing a VS Code extension that loads Yjs inside a WebView.
VS Code WebViews cannot import ES modules due to CSP restrictions, so I cannot use:

import * as Y from "https://esm.run/yjs"

I need the UMD/IIFE browser bundle (yjs.js) that exposes:

window.Y

However, the latest Yjs releases (e.g., yjs-14.0.0-13) only contain ESM source files in /src and do not include any browser bundle such as:

dist/yjs.js
dist/yjs.umd.js
dist/yjs.iife.js

CDN links that used to work also return 404:

https://cdn.jsdelivr.net/npm/yjs/dist/yjs.js
https://unpkg.com/yjs/dist/yjs.js

Because VS Code WebView requires a local bundle, Yjs fails to load:

ERROR: Yjs (Y) is not defined

Question:

1. Does Yjs still publish a browser UMD bundle anywhere? If so, where is the official link?

2. If not, how do I correctly build yjs.js manually from the source repo using Rollup?

3. What is the recommended way to use Yjs in VS Code Webviews now that ESM imports are blocked?