feat(items): add new item modules and enhance item functionality

- Introduced various item modules including '흑색마', '사륜거', '단궁', '동호비궁', '도기', '변도론', '전론', and '환약'.
- Implemented stat item modules to enhance general and war action contexts.
- Added triggers for item healing and sniping actions during battles.
- Enhanced item management with new utility functions for inventory handling.
- Updated the item registry and loader to support new items and their functionalities.
- Improved the overall structure of item-related code for better maintainability and scalability.

docs/architecture/todo.md

@@ -40,6 +40,7 @@ Move items into the main docs once they are finalized.
 ## Trigger System
 
 - Example trigger sets per scenario or rule pack
+- [AI suggestion] Define item/equipment effect modeling for war triggers (equip vs carry, stacking, consumable/breakable) and hook into WarActionPipeline/trigger registry.
 
 ## Data and Profiles (Lower Priority)