Function getOrCreateScreenRegion

getOrCreateScreenRegion(
cameraObject: SceneObject,
scene: Scene,
): ScreenRegionComponent
Retrieves or creates a ScreenRegionComponent for a given camera object and scene.
Parameters
- cameraObject: SceneObject
  The camera object to search for a ScreenRegionComponent.
- scene: Scene
  The scene in which to create the ScreenRegionComponent if it doesn't exist.
Returns ScreenRegionComponent
The ScreenRegionComponent associated with the camera object, or a newly created one.