feat: LazyEntityUpdater

@sammo/game_logic/src/NationEntity.ts

@@ -0,0 +1,9 @@
+import type { CityID, NationID, NationName, NationType } from "./defs.js";
+
+export interface INationEntity{
+    id: NationID;
+    name: NationName;
+    type: NationType;
+
+    capitalID: CityID;
+}