feat: add unification handler and inheritance system

- Implemented `unificationHandler.ts` to manage nation unification logic, including inheritance point calculations and logging.
- Created `InheritView.vue` for frontend management of inheritance points, buffs, and logs.
- Added database migration for new inheritance tables: `inheritance_point`, `inheritance_log`, `inheritance_result`, and `inheritance_user_state`.
- Developed inheritance buff logic in `inheritBuff.ts` to apply buffs during domestic and war actions.

packages/logic/src/index.ts

@@ -7,6 +7,7 @@ export * from './logging/index.js';
 export * from './messages/index.js';
 export * from './items/index.js';
 export { ITEM_KEYS, createItemActionModules, createItemModuleRegistry, loadItemModules } from './items/index.js';
+export * from './inheritance/inheritBuff.js';
 export * from './resources/index.js';
 export * from './ports/world.js';
 export * from './ports/worldSnapshot.js';