refactor(animation): 更新动画和预设资源优化表现

- notify.anim 新增位置向量轨迹和关键帧曲线数据，丰富动画表现
- notify.prefab 增加和调整节点、组件及属性，提升UI结构和视觉布局
- hero hc1 的 move.anim 动画时长和帧数据调整，优化动作流畅度
- atk_fires.prefab 添加 withHero 属性以支持技能表现扩展
- 删除了 game/skills 目录下的 buff.prefab 和 buff_iced.prefab 资源，清理无用资源

assets/resources/game/skill/buff/buff_max.prefab

@@ -0,0 +1,289 @@
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+    "_srcBlendFactor": 2,
+    "_dstBlendFactor": 4,
+    "_color": {
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+    "nestedPrefabInstanceRoots": null
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+    "fileId": "18p/ymMfpOAYzUdQFqBjOm"
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+    "_name": "",
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+    "_clips": [
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+        "__expectedType__": "cc.AnimationClip"
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+    "fileId": "99oOq3VplP7rFui5vj3Dq0"
+  },
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+    "targetOverrides": null
+  }
+]