feat(hero): 添加受击闪光效果并重构相关代码

新增FlashSprite组件实现受击闪光效果
重构HeroAnmComp和HeroViewComp以支持闪光效果
更新多个英雄prefab以包含闪光材质和组件

assets/script/game/hero/hit-flash-white/scripts/FlashSprite.ts

@@ -0,0 +1,29 @@
+import { _decorator, color, Component, Material, Node, Sprite } from 'cc';
+const { ccclass, property } = _decorator;
+
+@ccclass('FlashSprite')
+export class FlashSprite extends Component {
+
+    @property(Material) 
+    hitFlashMaterial: Material;
+    orginalFlashMaterial: Material;
+    sprite: Sprite;
+
+    start() {
+        this.sprite = this.node.getComponent(Sprite);
+        this.orginalFlashMaterial = this.sprite.getRenderMaterial(0);   
+
+    }
+
+    update(deltaTime: number) {
+        
+    }
+
+    public clickFlash() {
+        this.sprite.setSharedMaterial(this.hitFlashMaterial, 0);
+        this.scheduleOnce(() => {
+            this.sprite.setSharedMaterial(this.orginalFlashMaterial, 0);
+        }, 0.1);
+    }
+}
+