feat: complete legacy unique item battle parity

packages/logic/src/war/triggers/전투력보정.ts

@@ -0,0 +1,24 @@
+import { TriggerPriority } from '@sammo-ts/logic/triggers/core.js';
+import { BaseWarUnitTrigger } from '@sammo-ts/logic/war/triggers.js';
+import type { WarUnit } from '@sammo-ts/logic/war/units.js';
+
+export class 전투력보정 extends BaseWarUnitTrigger {
+    constructor(
+        unit: WarUnit,
+        private readonly attackMultiplier: number,
+        private readonly defenceMultiplier = 1
+    ) {
+        super(unit, TriggerPriority.Begin + 20);
+    }
+
+    protected actionWar(
+        self: WarUnit,
+        oppose: WarUnit,
+        _selfEnv: Record<string, unknown>,
+        _opposeEnv: Record<string, unknown>
+    ): boolean {
+        self.multiplyWarPowerMultiply(this.attackMultiplier);
+        oppose.multiplyWarPowerMultiply(this.defenceMultiplier);
+        return true;
+    }
+}