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/text-decoder/README.md

@@ -0,0 +1,36 @@
+# text-decoder
+
+Streaming text decoder that preserves multibyte Unicode characters.
+
+```
+npm i text-decoder
+```
+
+## Usage
+
+``` js
+const TextDecoder = require('text-decoder')
+
+const td = new TextDecoder()
+
+td.push(Buffer.of(0xf0, 0x9f, 0x92)) // returns ''
+td.push(Buffer.of(0xa9)) // returns '💩'
+```
+
+## API
+
+#### `const td = new TextDecoder([encoding])`
+
+Create a text decoder. `encoding` defaults to `utf8`.
+
+#### `const string = td.push(data)`
+
+Push either a `Buffer` or a `string` to the text decoder. Returns the decoded string, buffering any partial data.
+
+#### `const string = td.end([data])`
+
+End the decoder, optionally pushing a final piece of data. Returns the decoded string.
+
+## License
+
+Apache-2.0