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/yargs/build/lib/utils/which-module.js

@@ -0,0 +1,10 @@
+export default function whichModule(exported) {
+    if (typeof require === 'undefined')
+        return null;
+    for (let i = 0, files = Object.keys(require.cache), mod; i < files.length; i++) {
+        mod = require.cache[files[i]];
+        if (mod.exports === exported)
+            return mod;
+    }
+    return null;
+}