Adding cnn calculate cosine by gpu

[pphuc25]

Upon examining the code, I noticed that it utilizes the sklearn cosine function to detect duplicates in the CNN. However, this implementation hampers performance, leading to slower execution. I recommend employing PyTorch to compute the cosine similarity instead, which should significantly improve the efficiency.

[tanujjain]

Thanks for the pointer. Would you be interested in making a PR?

[pphuc25]

Yes!, I am going to do it