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/devtools-protocol/pdl/domains/DeviceOrientation.pdl

@@ -0,0 +1,20 @@
+# Copyright 2017 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+#
+# Contributing to Chrome DevTools Protocol: https://goo.gle/devtools-contribution-guide-cdp
+
+experimental domain DeviceOrientation
+
+  # Clears the overridden Device Orientation.
+  command clearDeviceOrientationOverride
+
+  # Overrides the Device Orientation.
+  command setDeviceOrientationOverride
+    parameters
+      # Mock alpha
+      number alpha
+      # Mock beta
+      number beta
+      # Mock gamma
+      number gamma