[CoreGraph] add createOrtho2dBackground() method for creating video background but in 2D mode with orthogonal projection.
[CoreGraph] add createBackgroung() to make creating bacground more clear and separating creating skynoise box to own createSkyNoiseBox() method.
[CoreGraph] change pointers to ref_ptr and fix orientation of texture in createOtho2dBacground(), add fas-forward declaration of CameraStream, update config