Upload README.md with huggingface_hub

Upload test_vectors_pipeline.npz with huggingface_hub

Link the validated Swift DSP reference (schism-dsp)

C-order vectors, demucs framing pairs, well-posed istft case

Add download instructions (mlpackage vs HF cache symlinks)

Add Core ML conversion (fp16-ANE + fp32 variants), verified vs reference

initial commit