feat(skill): 添加新技能资源并调整动画参数

添加多个新技能动画、预制体及其元数据文件，包括黄色准备动画、大型火球攻击动画、buff_dian动画和风球攻击动画。
同时删除旧的 ball_sgreen 动画和 ball_light-001 预制体。
调整多个现有动画的采样率和持续时间以优化播放效果。
在技能图集中添加新的箭头精灵帧。
微调英雄 hm2 的缩放比例。

assets/resources/game/skill/skill2.plist.meta

@@ -1249,6 +1249,52 @@
       ],
       "subMetas": {}
     },
+    "0ab4e": {
+      "importer": "sprite-frame",
+      "uuid": "2423272e-e63b-4736-b15b-30b40cf98a23@0ab4e",
+      "displayName": "",
+      "id": "0ab4e",
+      "name": "Arrow",
+      "userData": {
+        "trimThreshold": 1,
+        "rotated": false,
+        "offsetX": 0,
+        "offsetY": 0,
+        "trimX": 1054,
+        "trimY": 730,
+        "width": 160,
+        "height": 48,
+        "rawWidth": 160,
+        "rawHeight": 48,
+        "borderTop": 0,
+        "borderBottom": 0,
+        "borderLeft": 0,
+        "borderRight": 0,
+        "packable": true,
+        "pixelsToUnit": 100,
+        "pivotX": 0.5,
+        "pivotY": 0.5,
+        "meshType": 0,
+        "vertices": {
+          "rawPosition": [],
+          "indexes": [],
+          "uv": [],
+          "nuv": [],
+          "minPos": [],
+          "maxPos": []
+        },
+        "isUuid": true,
+        "imageUuidOrDatabaseUri": "411ad850-2633-49ad-bd2a-24e1ac33745d@6c48a",
+        "atlasUuid": "2423272e-e63b-4736-b15b-30b40cf98a23",
+        "trimType": "auto"
+      },
+      "ver": "1.0.12",
+      "imported": true,
+      "files": [
+        ".json"
+      ],
+      "subMetas": {}
+    },
     "cb414": {
       "importer": "sprite-frame",
       "uuid": "2423272e-e63b-4736-b15b-30b40cf98a23@cb414",