Integrate a client for buildingSMART Data Dictionary web service.

This project will build and integrate a Python-based client for the buildingSMART Data Dictionary (bSDD) directly into FreeCAD's BIM Workbench. This integration will allow users to dynamically search and apply international classification standards from the cloud, providing context-aware suggestions based on the underlying IFC entity. To ensure a stable and non-disruptive integration, the project will implement a "dual-layer" data model. This approach will securely store the rich, web-fetched bSDD metadata while automatically populating the existing legacy string properties, guaranteeing 100% backward compatibility with FreeCAD's current stable workflows.