added latest compiled version to git

scripts/copy-latest.mjs

@@ -0,0 +1,49 @@
+import { watch } from 'node:fs';
+import { access, constants, copyFile, mkdir } from 'node:fs/promises';
+import { dirname, join } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const root = join(__dirname, '..');
+const source = join(root, 'dist/phx-frontend-plugin-demo/browser/main.js');
+const dest = join(root, 'latest/main.js');
+
+async function copyMainJs() {
+  try {
+    await access(source, constants.F_OK);
+    await mkdir(dirname(dest), { recursive: true });
+    await copyFile(source, dest);
+    console.log('[latest] Copied main.js');
+  } catch (err) {
+    if (err.code !== 'ENOENT') {
+      console.error('[latest] Copy failed:', err.message);
+    }
+  }
+}
+
+function watchMainJs() {
+  let timeout;
+
+  const debouncedCopy = () => {
+    clearTimeout(timeout);
+    timeout = setTimeout(copyMainJs, 100);
+  };
+
+  const tryWatch = () => {
+    access(source, constants.F_OK)
+      .then(() => {
+        copyMainJs();
+        watch(source, debouncedCopy);
+        console.log('[latest] Watching for main.js changes');
+      })
+      .catch(() => setTimeout(tryWatch, 500));
+  };
+
+  tryWatch();
+}
+
+if (process.argv.includes('--watch')) {
+  watchMainJs();
+} else {
+  copyMainJs();
+}