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/estraverse/.jshintrc

@@ -0,0 +1,16 @@
+{
+  "curly": true,
+  "eqeqeq": true,
+  "immed": true,
+  "eqnull": true,
+  "latedef": true,
+  "noarg": true,
+  "noempty": true,
+  "quotmark": "single",
+  "undef": true,
+  "unused": true,
+  "strict": true,
+  "trailing": true,
+
+  "node": true
+}