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/get-uri/dist/notmodified.d.ts

@@ -0,0 +1,10 @@
+/**
+ * Error subclass to use when the source has not been modified.
+ *
+ * @param {String} message optional "message" property to set
+ * @api protected
+ */
+export default class NotModifiedError extends Error {
+    code: string;
+    constructor(message?: string);
+}