Added support for all QML built-in types in NetVariant:
- rect/QRectF maps to System.Drawing.RectangleF
- point/QPointF maps to System.Drawing.Point
- size/QSizeF maps to System.Drawing.SizeF
- color/QColor maps to System.Drawing.Color
The following require .NET Standard 2.1:
- vector2d/QVector2D maps to System.Numerics.Vector2
- vector3d/QVector3D maps to System.Numerics.Vector3
- vector4d/QVector4D maps to System.Numerics.Vector4
- quaternion/QQuaternion maps to System.Numerics.Quaternion
- matrix4x4/QMatrix4x4D maps to System.Numerics.Matrix4x4
Additionally, the following are supported as well for convenience:
- QRect maps to System.Drawing.Rectangle
- QPoint maps to System.Drawing.Point
- QSize maps to System.Drawing.Size