readme: browser import example

Author: matmen

README.md

@@ -23,6 +23,19 @@ npm install imagescript              # Node.js, Bun and bundlers
 deno add jsr:@matmen/imagescript     # Deno
 ```
 
+Without a bundler, import it from jsDelivr in the browser:
+
+```html
+<script type="module">
+  import { Image } from 'https://cdn.jsdelivr.net/npm/imagescript@3/+esm';
+
+  const image = await Image.decode(await fetch('photo.jpg').then(r => r.arrayBuffer()));
+  image.resize(256, Image.RESIZE_AUTO);
+  const url = URL.createObjectURL(new Blob([await image.encode()], { type: 'image/png' }));
+  document.body.append(Object.assign(document.createElement('img'), { src: url }));
+</script>
+```
+
 ---
 
 ### Example