feat: add support for remote CDP browsers

[Niek]

This PR adds support for remote browsers using Playwright over CDP. Example use:

export GEMINI_API_KEY="..."
export CDP_URL="wss://connect.undetect.io/launch?key=..." # Or any other CDP WebSocket URL
python main.py --query="Go to Google and type 'Hello World' into the search bar" --env="playwright"