Implement loading of cube data from JSON file

rc_services_room/src/persist/config/mod.rs

@@ -0,0 +1,9 @@
+mod cubes;
+pub use cubes::{CubeConfig, ItemTier};
+//pub use cubes::{Cube, ItemCategory, VisibilityMode, ItemType};
+
+mod movement;
+pub use movement::{MovementCategoryData, MovementData};
+
+mod weapon;
+pub use weapon::WeaponData;