Cross-link to demucs-onnx Python package (open-source ONNX export tooling on PyPI)

Cross-link to demucs-onnx Python package (open-source ONNX export tooling on PyPI)

feat: add htdemucs_ft_vocals_fp16weights.onnx (fp16-weights compact-storage variant)

feat: add htdemucs_ft_other_fp16weights.onnx (fp16-weights compact-storage variant)

feat: add htdemucs_ft_drums_fp16weights.onnx (fp16-weights compact-storage variant)

feat: add htdemucs_ft_bass_fp16weights.onnx (fp16-weights compact-storage variant)

docs: add fp16-weights compact-storage variant section

Add htdemucs_ft_bass.onnx

Add htdemucs_ft_drums.onnx

Add htdemucs_ft_vocals.onnx

Add htdemucs_ft_other.onnx

Initial release: complete 4-stem htdemucs_ft ONNX bag (drums/bass/other/vocals) + numpy aggregator

initial commit