feat: Add Professional Construction Drawing Intelligence Framework

🏗️ MAJOR ARCHITECTURE: Professional construction drawing reading framework

Based on industry expert resources:
- CAD Drafter: Step-by-step construction reading methodology
- MT Copeland: Complete blueprint reading standards
- Premier CS: Construction drawing documentation standards
- TCLI: Professional blueprint reading for civil construction

Core Professional Framework:
• ConstructionDrawingIntelligence class with industry workflows
• Professional reading sequence: edges → legends → bearings → structure → MEP → coordination
• Drawing type classification using sheet prefixes (A-, S-, M-, E-, P-, C-)
• Scale detection and calibration systems
• Architectural symbol recognition with standard meanings
• Multi-discipline coordination checking
• Quality validation and industry compliance

Professional Capabilities:
• Title block information extraction (project, scale, revision)
• Line weight analysis (heavy=cut sections, medium=visible, light=hidden)
• Material hatch pattern recognition (concrete, brick, insulation, metal)
• Symbol library integration (doors, windows, electrical, MEP, fire safety)
• Room and wall detection enhancement for AutoFire
• NFPA compliance validation

Integration Ready:
• enhance_autofire_with_construction_intelligence() main function
• Professional analysis enhancement of AutoFire visual results
• Construction intelligence overlay for device placement validation
• Industry-standard reading workflows and best practices

Framework Status: Architecture complete, implementation methods stubbed
Ready for: CI agent parallel development of detailed implementations
Next: Complete method implementations while submitting PR for foundation

This establishes AutoFire as a truly professional construction AI system! 🚀

Author: Obayne