fix(hero): 修复英雄死亡状态处理和怪物生成逻辑

调整HeroAnmComp中动画完成时的状态检查，增加dead和stun状态
修改MissionMonComp中怪物生成逻辑，现在只生成第一个怪物
重构HeroViewComp的死亡处理逻辑，添加死亡计时器和复活功能

assets/script/game/map/MissionMonComp.ts

@@ -108,7 +108,8 @@ export class MissionMonCompComp extends CCComp {
     
         const monsConf = getStageMonConfigs(cStage);
         // console.log(`[MissionMonComp]:第${cStage}关 - ${stageType}类型，怪物数量: ${monsConf.length}`);
-        this.generateMonsters(monsConf);
+        const monsConfFiltered = monsConf.filter((mon: any, index) => index === 0);
+        this.generateMonsters(monsConfFiltered);
     }