fix(skill): 调整普攻技能配置与表现

1.  修改普攻预制体的缩放、尺寸、锚点与精灵贴图
2.  更新普攻动画的采样率、时长与帧动画帧
3.  调整技能配置，将默认普攻替换为6006并修正攻击类型
4.  统一全英雄与怪物的默认技能为6006普攻

assets/resources/game/skill/atk/atk.prefab

@@ -108,8 +108,8 @@
     },
     "_lscale": {
       "__type__": "cc.Vec3",
-      "x": -0.5,
-      "y": 0.5,
+      "x": 1.6,
+      "y": 1.4,
       "z": 1
     },
     "_mobility": 0,
@@ -136,13 +136,13 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 139,
-      "height": 128
+      "width": 95,
+      "height": 96
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
       "x": 0.5,
-      "y": 0.5
+      "y": 0
     },
     "_id": ""
   },
@@ -172,7 +172,10 @@
       "b": 255,
       "a": 255
     },
-    "_spriteFrame": null,
+    "_spriteFrame": {
+      "__uuid__": "2842dc10-d89e-4ff6-8a11-6d09bf48cf20@3c745",
+      "__expectedType__": "cc.SpriteFrame"
+    },
     "_type": 0,
     "_fillType": 0,
     "_sizeMode": 1,
@@ -186,7 +189,7 @@
     "_isTrimmedMode": true,
     "_useGrayscale": false,
     "_atlas": {
-      "__uuid__": "3d46f945-3f07-477e-a95a-b49557d552c6",
+      "__uuid__": "2842dc10-d89e-4ff6-8a11-6d09bf48cf20",
       "__expectedType__": "cc.SpriteAtlas"
     },
     "_id": ""
@@ -222,13 +225,13 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 30,
-      "height": 50
+      "width": 120,
+      "height": 120
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
       "x": 0.5,
-      "y": 0.5
+      "y": 0
     },
     "_id": ""
   },
@@ -248,7 +251,7 @@
     "__prefab": {
       "__id__": 11
     },
-    "atk_x": 0,
+    "atk_x": 20,
     "atk_y": 0,
     "_id": ""
   },
@@ -311,12 +314,12 @@
     "_offset": {
       "__type__": "cc.Vec2",
       "x": 0,
-      "y": 0
+      "y": 59.9
     },
     "_size": {
       "__type__": "cc.Size",
-      "width": 30,
-      "height": 50
+      "width": 120,
+      "height": 120
     },
     "_id": ""
   },