feat: add new general actions for border return, gifting, disbanding, founding nations, and fierce training

- Implemented '접경귀환' action for returning to a home city within 3 spaces.
- Added '증여' action for transferring resources between generals with constraints.
- Created '해산' action to disband a faction, resetting generals and cities.
- Developed '건국' action for founding a new nation with specified attributes.
- Introduced '맹훈련' action for training generals, enhancing their stats.
- Added tests for the new actions to ensure functionality and constraints are respected.

app/game-engine/src/turn/ai/generalAi/constraint.ts

@@ -11,6 +11,14 @@ export const resolveConstraintEnv = (
 ): ConstraintEnv => {
     const startYear = typeof scenarioMeta?.startYear === 'number' ? scenarioMeta.startYear : undefined;
     const relYear = typeof startYear === 'number' ? world.currentYear - startYear : undefined;
+    const worldMeta = world.meta as Record<string, unknown>;
+    const rawKillturn = worldMeta.killturn;
+    const killturn =
+        typeof rawKillturn === 'number'
+            ? rawKillturn
+            : typeof rawKillturn === 'string'
+              ? Number(rawKillturn)
+              : undefined;
 
     return {
         currentYear: world.currentYear,
@@ -21,5 +29,6 @@ export const resolveConstraintEnv = (
         relYear,
         openingPartYear: env.openingPartYear,
         minAvailableRecruitPop: env.minAvailableRecruitPop,
+        ...(Number.isFinite(killturn) ? { killturn } : {}),
     };
 };