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/@puppeteer/browsers/lib/esm/debug.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"debug.d.ts","sourceRoot":"","sources":["../../src/debug.ts"],"names":[],"mappings":"AAAA;;;;GAIG;AAEH,OAAO,KAAK,MAAM,OAAO,CAAC;AAE1B,OAAO,EAAC,KAAK,EAAC,CAAC"}