Merge feature/lift-lts-viewer-module-upto-qt6 into feature/regression-arcgis300-symbology-migration

- Integrated LTS viewer module with Qt6 migration
- Resolved all merge conflicts by keeping current branch versions
- Preserved existing Qt6 migration fixes

qt6-after/qt6-migrated-legatus/Lts/Viewer/SituationMap/Map/situation_map_types.h

@@ -189,9 +189,11 @@ enum class RenderingMode
 
 enum class SurfacePlacement
 {
-  Draped,                ///< Draped (0)
-  Absolute,              ///< Absolute (1)
-  Relative               ///< Relative (2)
+  DrapedFlat = 4,        ///< DrapedFlat (4) - renamed from Draped in ArcGIS SDK v300
+  Absolute = 1,          ///< Absolute (1)
+  Relative = 2,          ///< Relative (2)
+  DrapedBillboarded = 0, ///< DrapedBillboarded (0) - new in ArcGIS SDK v300
+  RelativeToScene = 3    ///< RelativeToScene (3) - new in ArcGIS SDK v300
 };