- Added support for Daily's built-in `screenVideo` destination in `DailyTransport`. When `"screenVideo"` is included in `video_out_destinations` transport parameter, a dedicated screen video track is created at join time and frames with `transport_destination="screenVideo"` are routed to it.

  ```python
  params = DailyParams(
        video_out_enabled=True,
        video_out_is_live=True,
        video_out_width=1280,
        video_out_height=720,
        video_out_destinations=["screenVideo"]
  )

  ...

  frame = OutputImageRawFrame(...)
  frame.transport_destination = "screenVideo"
  ```
