- Add serialization support to `World`, `EntityAllocator`, and
`SparseSet`
- Implement `SaveGame` and `LoadGame` functionality in the TicTacToe
example
- Add ability to resume a game from a saved state
- Implement auto-save after every move in the game loop
Implement a complete Tic-Tac-Toe game using OECS to demonstrate
ECS patterns, including:
- Command pattern for placing marks
- System groups for logical updates and rendering
- CSV loading for initial board state
- Reactivity logging for observing entity and component changes