refactor(skill): 调整技能触发枚举的存放位置与使用方式

将SkillTriggerType枚举从GameEvent.ts迁移到heroSet.ts，统一管理技能触发相关配置，同时更新所有引用该枚举的文件路径，优化代码结构与维护性

assets/script/game/hero/SkillTriggerHelper.ts

@@ -1,5 +1,6 @@
 import { oops } from "db://oops-framework/core/Oops";
-import { GameEvent, SkillTriggerType } from "../common/config/GameEvent";
+import { GameEvent } from "../common/config/GameEvent";
+import { SkillTriggerType } from "../common/config/heroSet";
 import { HeroAttrsComp } from "./HeroAttrsComp";
 import { HeroViewComp } from "./HeroViewComp";
 import { FacSet } from "../common/config/GameSet";