Add CenterCrop image preprocessor

[zaleslaw]

The CenterCrop image preprocessor is missed in KotlinDL.
It should crop the given image at the center. If the image size is smaller than the output size along any edge, the image is padded with 0 and then center cropped.

The main question is: should we keep both Cropping and CenterCrop ops, or should it be merged in one operation?

The desired PR addressing this issue should include:

• Implementation (you can take inspiration from the implementation of Cropping as reference)
• Documentation
• JUnit tests in dataset module
• An example with usage of this image preprocessor

P.S. If you want to take this ticket, please leave the comment below
P.P.S Read the Contributing Guidelines.

The reference implementation could be taken from torchvision.transforms

[zaleslaw]

@juliabeliaeva could you have a look at this ticket?

[juliabeliaeva]

@zaleslaw yes, assign this issue to me, please.