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/hero/HeroAnmComp.ts

@@ -21,7 +21,7 @@ export default class HeroAnmComp extends Component{
     }
     onAnimationFinished(type:Animation.EventType, state:AnimationState){
     // console.log("[HeroAnmComp]: 动画播放完毕",state.name)
-        if(state.name!="idle"&&state.name!="move"){
+        if(state.name!="idle"&&state.name!="move"&&state.name!="dead"&&state.name!="stun"){
             this.anmcon.play(this.default_anim)
         }
     }