[mahach666]

Summary

Borrow and integrate high-impact core capabilities inspired by IfcOpenShell into IfcIO:

• 4D Construction Scheduling & Sequencing:
  • \IfcWorkSchedule, \IfcTask, \IfcTaskTime, \IFCRELSEQUENCE, and \IFCRELASSIGNSTOPROCESS\
  • Temporal 4D simulation engine: query active tasks, element states (\Planned, \InProgress, \Completed, \NotStarted), and completion ratio at any simulation date.
  • Interactive 4D timeline simulation playback in standalone 3D HTML viewer.
• 5D Cost Planning & CBS Budgeting:
  • \IfcCostSchedule, \IfcCostItem, \IfcCostValue, \IFCAPPLIEDVALUE, and \IFCRELASSIGNSTOCONTROL\
  • Hierarchical CBS tree with automatic cost rollup, unit rates, quantities, and element assignments.
• Spatial Zones:
  • \IfcZone\ conforming to buildingSMART \IFCZONE\ with thermal, acoustic, fire safety, security, and ventilation classifications.
• buildingSMART BCF 2.1 Bi-directional Archive Container:
  • \BcfArchive\ with \Open(path/stream), \Save(path/stream), \FindTopicsByElement, \FindTopicsByStatus, snapshot handling, and viewpoint cameras.
• IfcOpenShell-Compatible High-Level API Facade:
  • \IfcApi.Sequence, \IfcApi.Cost, \IfcApi.Spatial, \IfcApi.Root\ for rapid script-like BIM automation.
• CLI Commands:
  • \ifcio schedule\ for 4D simulation and CSV export.
  • \ifcio cost\ for 5D cost schedule and CSV reporting.
  • \ifcio bcf\ for BCF 2.1 inspection.
• DocFX & Documentation:
  • Comprehensive guide updates in \README.md, \docs/getting-started.md, and \docs/public-api.md.

Verification

• 130 tests passing on both .NET 8 and .NET 10 (0 failed, 0 skipped).
• DocFX site built with 0 errors and 0 warnings (145 models, 139 HTML pages).