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/map/map_rpg.prefab

@@ -2480,7 +2480,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 180,
+      "y": 183.281,
       "z": 0
     },
     "_lrot": {
@@ -2521,7 +2521,7 @@
     "_contentSize": {
       "__type__": "cc.Size",
       "width": 960,
-      "height": 200
+      "height": 270
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -2596,7 +2596,7 @@
     "_left": 0,
     "_right": 0,
     "_top": 0,
-    "_bottom": 230,
+    "_bottom": 233.281,
     "_horizontalCenter": 0,
     "_verticalCenter": 0,
     "_isAbsLeft": true,
@@ -11766,6 +11766,8 @@
       "__id__": 0
     },
     "fileId": "8aR4+WXvRJrJfyR9Sp7SqP",
+    "instance": null,
+    "targetOverrides": null,
     "nestedPrefabInstanceRoots": null
   },
   {
@@ -11908,7 +11910,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 180,
+      "y": 183.281,
       "z": 0
     },
     "_lrot": {
@@ -11949,7 +11951,7 @@
     "_contentSize": {
       "__type__": "cc.Size",
       "width": 960,
-      "height": 200
+      "height": 270
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -12024,7 +12026,7 @@
     "_left": 0,
     "_right": 0,
     "_top": 0,
-    "_bottom": 230,
+    "_bottom": 233.281,
     "_horizontalCenter": 0,
     "_verticalCenter": 0,
     "_isAbsLeft": true,
@@ -12188,6 +12190,8 @@
       "__id__": 0
     },
     "fileId": "20WNwIV7RJjrst2VhRbe8x",
+    "instance": null,
+    "targetOverrides": null,
     "nestedPrefabInstanceRoots": null
   },
   {