Migration away from DLIB

[Halmoni100]

@boltgolt I have a vested interest in getting the CNN feature to work on a cross-GPU/NPU-platform. Perhaps CPU SIMD for preprocessing and PyTorch/ONNX for the DL component? I'm a C++/signal-processing/ML developer and would be willing to do the work for that.

Edit: actually DLIB is probably still good for CPU stuff