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/yargs/yargs.mjs

@@ -0,0 +1,10 @@
+// TODO: consolidate on using a helpers file at some point in the future, which
+// is the approach currently used to export Parser and applyExtends for ESM:
+import pkg from './build/index.cjs';
+const {applyExtends, cjsPlatformShim, Parser, processArgv, Yargs} = pkg;
+Yargs.applyExtends = (config, cwd, mergeExtends) => {
+  return applyExtends(config, cwd, mergeExtends, cjsPlatformShim);
+};
+Yargs.hideBin = processArgv.hideBin;
+Yargs.Parser = Parser;
+export default Yargs;