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/pac-proxy-agent/README.md

@@ -0,0 +1,27 @@
+pac-proxy-agent
+===============
+### A [PAC file][pac-wikipedia] proxy `http.Agent` implementation for HTTP and HTTPS
+
+This module provides an `http.Agent` implementation that retreives the specified
+[PAC proxy file][pac-wikipedia] and uses it to resolve which HTTP, HTTPS, or
+SOCKS proxy, or if a direct connection should be used to connect to the
+HTTP endpoint.
+
+It is designed to be be used with the built-in `http` and `https` modules.
+
+Example
+-------
+
+```ts
+import * as http from 'http';
+import { PacProxyAgent } from 'pac-proxy-agent';
+
+const agent = new PacProxyAgent('pac+https://cloudup.com/ceGH2yZ0Bjp+');
+
+http.get('http://nodejs.org/api/', { agent }, (res) => {
+  console.log('"response" event!', res.headers);
+  res.pipe(process.stdout);
+});
+```
+
+[pac-wikipedia]: http://wikipedia.org/wiki/Proxy_auto-config