Design and Implement a `Crop` Interface

[Pedrexus]

Description:

The library should allow users to crop videos, which means extracting a specific portion of the video frame while discarding the rest. We need to design and introduce a crop interface for this purpose.

Proposed Interface:

Crop Method:

def crop(self, left: int, upper: int, right: int, lower: int) -> Video:
    """
    Crop the video frame to the specified bounding box.

    Args:
    - left (int): The left pixel coordinate.
    - upper (int): The top pixel coordinate.
    - right (int): The right pixel coordinate.
    - lower (int): The bottom pixel coordinate.

    Returns:
    - Video: A new video object with the cropped frames.
    """

Usage Example:

cropped_video = video_instance.crop(50, 50, 450, 350)

Expected Outcome:

• Users should be able to crop their videos to a specified bounding box using the crop method.
• The cropped video should retain all properties of the original video, including frame rate, audio, etc., but with the new dimensions.

Additional Notes:

• Error handling is essential. We should check if the given coordinates are valid and raise appropriate errors otherwise.
• It might be helpful to allow users to specify the crop region in terms of percentage or actual pixel coordinates.
• Ensure that cropping doesn't inadvertently affect the audio sync of the video.
• Consider providing a preview feature so users can see the crop area before applying the operation.
• base yourself on the torchvision crop

[Pedrexus]

@usagi88 please work on the tests for this

[Usagi5677]

@Pedrexus please check #11