Feature request: Optional CaptchaAI API for CAPTCHA challenges

[Ethan-wkr]

Hi @bomquote (or maintainers),

Thanks for building Transistor — a powerful scraping framework.

Since it supports sites with CAPTCHA protection, would you consider adding optional support for CaptchaAI (https://captchaai.com/)? Their HTTP API handles reCAPTCHA and similar automatically, which may complement existing techniques like Splash or Crawlera.

Docs: https://captchaai.com/api-docs.php

Just a suggestion to give users more flexibility — appreciate all your excellent work!