wrap page evaluate with timeout

[LawyZheng]

[!IMPORTANT] Wraps page evaluations with a timeout using SkyvernFrame.evaluate() and removes deprecated JavaScript-triggered handling.

• Behavior:
  • Wraps page evaluations with a timeout using SkyvernFrame.evaluate() in agent.py, handler.py, scraper.py, and browser_factory.py.
  • Removes handling of javascript_triggered in agent.py and handler.py.
• Functions:
  • Adds SkyvernFrame.evaluate() to handle timeouts for page evaluations.
  • Removes is_javascript_triggered() and related logic.
• Misc:
  • Removes javascript_triggered attribute from ActionResult and related classes in responses.py.

^{This description was created by for ba3fc14759c7e2588447e19756164f361bbf9edc. It will automatically update as commits are pushed.}