usb: host: uvc: implement full host uvc driver with video API support

This patch refactors the UVC host implementation from a minimal stub
to a complete USB Video Class (UVC) host driver. Key changes include:

- Introduce `struct uvc_device` to manage device state, FIFOs, mutex,
  descriptors, and video format information.
- Add comprehensive descriptor parsing for VideoControl and
  VideoStreaming interfaces, including format and frame descriptors.
- Implement UVC probe/commit protocol for format negotiation and
  bandwidth calculation.
- Support dynamic frame rate adjustment and alternate interface
  selection based on bandwidth.
- Provide full video API integration:
  - set/get format, capabilities, frame intervals
  - start/stop streaming, buffer enqueue/dequeue
  - control handling (brightness, contrast, exposure, focus, etc.)
- Add ISO transfer handling with UVC payload header parsing and
  frame assembly.
- Enhance device initialization and cleanup routines.
- Update device definition macros and register UVC host class.

Signed-off-by: Aiden Hu <[email protected]>

Author: AidenHu