Add Brave CDP automation, replace Oracle browser mode

Connects to user's running Brave via Chrome DevTools Protocol
to automate ChatGPT interaction. Uses puppeteer-core to open a
tab, send the prompt, wait for response, and extract the result.

No cookies, no separate profiles, no copy/paste. Just connects
to the browser where the user is already logged in.

One-time setup: relaunch Brave with --remote-debugging-port=9222

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

node_modules/y18n/build/lib/cjs.js

@@ -0,0 +1,6 @@
+import { y18n as _y18n } from './index.js';
+import nodePlatformShim from './platform-shims/node.js';
+const y18n = (opts) => {
+    return _y18n(opts, nodePlatformShim);
+};
+export default y18n;