Update README.md

fix: remove Hugging Face metadata table from GitHub README

fix: add Hugging Face Spaces YAML metadata

docs: highlight AST-level analysis in README pipeline

feat: 9-agent pipeline with hardware-aware analysis, drift detection, build copilot

chore: Clean up demo script and enhance README with live URL and Mermaid diagram

feat: Add AMD GPU fine-tuning pipeline (QLoRA on CodeLlama via ROCm)

Initial commit for AMD Developer Hackathon: Multi-Agent ROCm Migration Engine