PR: Reversed Y-axis in local placement of IfcWindow entities

### Problem Description

The IFC standard seems to suggest that the **positive Y axis of the local placement** of ```IfcWindow``` entities always points to the **interior** side and therefore determines the swing direction:


This becomes important when checking for objects that may interfere with the window swing (e.g. Solibri rule 226). Unfortunately, Revit exports ```IfcWindow``` entities with the positive Y axis of the local placement pointing to the **exterior**.

- Tested in 25.4.4
- Test file: https://github.com/andydandy74/MyIssues/blob/master/RevitIFC921/191_WindowLocalPlacement.rvt

### Expected behaviour
Have the positive Y axis of the local placement of ```IfcWindow``` entities oriented to the **interior** side.

### Revit Version

2025.4.x

### IFC for Revit Addon Version

25.4.0

### Windows Version

11 24H2

Start by reproducing the export with RevitIFC921/191_WindowLocalPlacement.rvt and inspect the IfcWindow local-placement export path in the C# project. Done means the positive Y axis of exported IfcWindow entities points to the interior side, while preserving correct swing-direction behavior for the reported Revit 2025.4.x case.

Written by the indexing model from the issue text.