feat: modules moved and engine moved to submodule

engine/core/math/bvh_abb.h

@@ -28,8 +28,9 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
-#ifndef BVH_ABB_H
-#define BVH_ABB_H
+#pragma once
+
+#include "core/math/aabb.h"
 
 // special optimized version of axis aligned bounding box
 template <typename BOUNDS = AABB, typename POINT = Vector3>
@@ -288,5 +289,3 @@ struct BVH_ABB {
 		return false;
 	}
 };
-
-#endif // BVH_ABB_H