Missing YUYV to RGB Conversion in start_fetching Method

[umarsync]

apps/camera/src/contexts/camera.rs

In the start_fetching method of the Camera struct, there's an issue where frames from the GstCamera are stored directly into the frame_buffer without converting them from YUYV to RGB. This causes the image data in the buffer to be corrupted.

Impact

Because the frames are not converted to RGB, the data in the frame_buffer ends up corrupted. This means that when you try to display or process these frames, they won't show correctly.

Steps to Reproduce

1. Initialize the camera
   Call Camera::init() to set up the camera.
2. Start fetching frames
   Invoke Camera::start_fetching() to begin capturing frames.
3. Observe the problem
   You'll notice that the frames stored in frame_buffer appear corrupted because they're missing the YUYV to RGB conversion.