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/FileSystem.pdl

@@ -0,0 +1,41 @@
+# 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 FileSystem
+  depends on Network
+  depends on Storage
+
+  type File extends object
+    properties
+      string name
+      # Timestamp
+      Network.TimeSinceEpoch lastModified
+      # Size in bytes
+      number size
+      string type
+
+  type Directory extends object
+    properties
+      string name
+      array of string nestedDirectories
+      # Files that are directly nested under this directory.
+      array of File nestedFiles
+
+  type BucketFileSystemLocator extends object
+    properties
+      # Storage key
+      Storage.SerializedStorageKey storageKey
+      # Bucket name. Not passing a `bucketName` will retrieve the default Bucket. (https://developer.mozilla.org/en-US/docs/Web/API/Storage_API#storage_buckets)
+      optional string bucketName
+      # Path to the directory using each path component as an array item.
+      array of string pathComponents
+
+  command getDirectory
+    parameters
+      BucketFileSystemLocator bucketFileSystemLocator
+    returns
+      # Returns the directory object at the path.
+      Directory directory