feat(render): interpolate entity transforms for rendering

Add RenderTransform component to smooth position/direction updates
and use it in entity and shadow passes.

include/Cubed/gameplay/ecs/animation.hpp

@@ -10,4 +10,5 @@ struct WalkPose {
     // for sound play
     float moving_time = 0.0f;
 };
+
 } // namespace Cubed

include/Cubed/gameplay/ecs/transform.hpp

@@ -21,4 +21,10 @@ struct Transform {
     Direction direction{};
 };
 
+struct RenderTransform {
+    Position position{};
+    Orientation orientation{};
+    Direction direction{};
+};
+
 } // namespace Cubed