feat: Add NXOpen Python intellisense integration

Implemented NXOpen Python stub file integration for intelligent code completion
in VSCode, significantly improving development workflow for NXOpen API usage.

Features Added:
- VSCode configuration for Pylance with NXOpen stub files
- Test script to verify intellisense functionality
- Comprehensive setup documentation with examples
- Updated development guidance with completed milestone

Configuration:
- Stub path: C:\Program Files\Siemens\Simcenter3D_2412\ugopen\pythonStubs
- Type checking mode: basic (balances help vs. false positives)
- Covers all NXOpen modules: Session, Part, CAE, Assemblies, etc.

Benefits:
- Autocomplete for NXOpen classes, methods, and properties
- Inline documentation and parameter type hints
- Faster development with reduced API lookup time
- Better LLM-assisted coding with visible API structure
- Catch type errors before runtime

Files:
- .vscode/settings.json - VSCode Pylance configuration
- tests/test_nxopen_intellisense.py - Verification test script
- docs/NXOPEN_INTELLISENSE_SETUP.md - Complete setup guide
- DEVELOPMENT_GUIDANCE.md - Updated with completion status

Testing:
- Stub files verified in NX 2412 installation
- Test script created with comprehensive examples
- Documentation includes troubleshooting guide

Next Steps:
- Research authenticated Siemens documentation access
- Investigate documentation scraping for LLM knowledge base
- Enable LLM to reference NXOpen API during code generation

This is Step 1 of NXOpen integration strategy outlined in DEVELOPMENT_GUIDANCE.md.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

DEVELOPMENT_GUIDANCE.md

@@ -918,7 +918,7 @@ When prioritizing work, ask:
 
 ### Stakeholders
 
-- **You (Antoine)**: Main developer, architect, decision maker
+- **Antoine Letarte**: Main developer, architect, decision maker
 - **Claude Code**: Development assistant for Atomizer software
 - **Future Contributors**: Will follow established patterns and documentation
 - **Future Users**: Will use LLM features for optimization workflows
@@ -998,6 +998,6 @@ python dashboard/start_dashboard.py
 
 ---
 
-**Document Maintained By**: Antoine (Main Developer)
+**Document Maintained By**: Antoine Letarte (Main Developer)
 **Last Review**: 2025-11-17
 **Next Review**: 2025-11-24