docs: add HuggingFace models, 17 sensing apps, v0.6.0 to README + user guide
README:
- New "Pre-Trained Models" section with HuggingFace download link
- Model table (safetensors, q4, q2, presence head, LoRA adapters)
- Updated benchmarks (0.008ms, 164K emb/s, 51.6% contrastive)
- "17 Sensing Applications" section (health, environment, multi-freq)
- v0.6.0 in release table as Latest
User guide:
- "Pre-Trained Models" section with quick start + huggingface-cli
- What the models do (presence, fingerprinting, anomaly, activity)
- Retraining instructions
- "Health & Wellness Applications" section with all 4 health scripts
- Medical disclaimer
Co-Authored-By: claude-flow <ruv@ruv.net>
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