Add support for all ML model types beyond GGUF:
- New discovery module for auto-scanning model directories
- Detect formats: GGUF, safetensors, ONNX, PyTorch, diffusion pipelines
- CLI commands: discover, scan, sync for manifest management
- Manifest v2.0 with format field, directory support, file lists
Python loaders (v2.0.0):
- ONNXLoader with CUDA/TensorRT execution providers
- WhisperLoader for faster-whisper with transcribe/stream
- get_auto_loader() for automatic backend selection
Breaking: Manifest schema upgraded to v2.0 (auto-migrates v1.x on load)
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
