fix: 调整游戏战斗站位与UI显示参数

1. 修正游戏地平线GAME_LINE数值，调整英雄和怪物的出生站位
2. 修改shadow预制体的缩放、尺寸和填充模式参数
3. 调整地图预制体的元素位置和尺寸
4. 优化技能动画的缩放参数和编辑器冗余配置

assets/resources/game/gui/shadow.prefab

@@ -52,8 +52,8 @@
     },
     "_lscale": {
       "__type__": "cc.Vec3",
-      "x": 1,
-      "y": 0.3,
+      "x": 1.6,
+      "y": 0.2,
       "z": 1
     },
     "_mobility": 0,
@@ -130,8 +130,8 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 284,
-      "height": 39
+      "width": 200,
+      "height": 20
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -172,7 +172,7 @@
     },
     "_type": 0,
     "_fillType": 0,
-    "_sizeMode": 1,
+    "_sizeMode": 0,
     "_fillCenter": {
       "__type__": "cc.Vec2",
       "x": 0,
@@ -241,8 +241,8 @@
     },
     "_lscale": {
       "__type__": "cc.Vec3",
-      "x": 0.3,
-      "y": 0.3,
+      "x": 0.2,
+      "y": 0.2,
       "z": 1
     },
     "_mobility": 0,