refactor: integrate key management into cursor module

- Move useKeyBindings functionality into useCursor as useGameKeys
- Flatten GameManager interface using intersection types
- Rename clearLog/getLog to clearKeyLog/getKeyLog for clarity
- Remove separate useKeyBindings module and exports
- Update all documentation to reflect new architecture
- Maintain backward compatibility for platform hooks

src/index.ts

@@ -1,4 +1,3 @@
 export * from './types';
 export * from './useGame';
 export * from './useGameStatus';
-export * from './useKeyBindings';