chore: import upstream snapshot with attribution

client/tools/copy-browser-scripts.ts

@@ -0,0 +1,20 @@
+import { cpSync, mkdirSync, rmSync } from 'node:fs';
+
+import { resolve } from 'node:path';
+
+const browserScriptDist = resolve(
+  __dirname,
+  '../../tools/client-plugins/browser-scripts/dist'
+);
+
+const destJsDir = resolve(__dirname, '../static/js');
+const srcJsDir = resolve(browserScriptDist, './js');
+
+// Everything is done synchronously to keep the script simple. There's no
+// performance benefit to doing this asynchronously since it's already so fast.
+rmSync(destJsDir, { recursive: true, force: true });
+mkdirSync(destJsDir, { recursive: true });
+
+cpSync(srcJsDir, destJsDir, {
+  recursive: true
+});