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/http-error.d.ts

@@ -0,0 +1,8 @@
+/**
+ * Error subclass to use when an HTTP application error has occurred.
+ */
+export default class HTTPError extends Error {
+    code: string;
+    statusCode: number;
+    constructor(statusCode: number, message?: string | undefined);
+}