Modular city generator for Unity with forensic-grade prefab validation, JSON metadata control, and runtime UI injection.

• 🔧 Runtime asset spawning from JSON metadata
• 🧩 Modular prefab structure (Buildings, Characters, Vehicles)
• 🧠 Validator scripts for prefab linkage and metadata integrity
• 🖥️ UI panel for manual asset injection and testing
• ⚙️ Node.js CLI tools for asset patching and structure generation
• 🚀 GitHub Actions for automated validation