add missing coordinateTransformContext property to QgsProject (#8145)

Author: 3nids

src/core/qgsproject.h

@@ -93,6 +93,7 @@ class CORE_EXPORT QgsProject : public QObject, public QgsExpressionContextGenera
     Q_PROPERTY( QString fileName READ fileName WRITE setFileName NOTIFY fileNameChanged )
     Q_PROPERTY( QString homePath READ homePath WRITE setPresetHomePath NOTIFY homePathChanged )
     Q_PROPERTY( QgsCoordinateReferenceSystem crs READ crs WRITE setCrs NOTIFY crsChanged )
+    Q_PROPERTY( QgsCoordinateTransformContext transformContext READ transformContext WRITE setTransformContext NOTIFY transformContextChanged )
     Q_PROPERTY( QString ellipsoid READ ellipsoid WRITE setEllipsoid NOTIFY ellipsoidChanged )
     Q_PROPERTY( QgsMapThemeCollection *mapThemeCollection READ mapThemeCollection NOTIFY mapThemeCollectionChanged )
     Q_PROPERTY( QgsSnappingConfig snappingConfig READ snappingConfig WRITE setSnappingConfig NOTIFY snappingConfigChanged )