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/zod/v3/helpers/errorUtil.js

@@ -0,0 +1,6 @@
+export var errorUtil;
+(function (errorUtil) {
+    errorUtil.errToObj = (message) => typeof message === "string" ? { message } : message || {};
+    // biome-ignore lint:
+    errorUtil.toString = (message) => typeof message === "string" ? message : message?.message;
+})(errorUtil || (errorUtil = {}));