lightOrientation property
当 isSupportNeumorphism 为 true 时有效。光源方向，分为左上、左下、右上、右下四个方向。用来控制光源照射方向，会影响高亮方向和阴影方向
Valid when isSupportNeumorphism is true. The direction of the light source is divided into four directions: upper left, lower left, upper right, and lower right. Used to control the illumination direction of the light source, which will affect the highlight direction and shadow direction
Implementation
final FLightOrientation? lightOrientation;