refactor(rogue): 调整Rogue模式怪物配置与战斗逻辑

1. 新增怪物出生站位配置
2. 调整单场战斗怪物数量为3只，支持0~2个Boss组合
3. 更新配置校验与怪物生成逻辑
4. 修复英雄预设体的尺寸与位置偏移

assets/resources/game/heros/mb1.prefab

@@ -250,7 +250,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": -86.962,
+      "y": -40.433,
       "z": 0
     },
     "_lrot": {
@@ -290,8 +290,8 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 384,
-      "height": 384
+      "width": 191.9,
+      "height": 192
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -981,8 +981,8 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 150,
-      "height": 150
+      "width": 80,
+      "height": 100
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -1090,12 +1090,12 @@
     "_offset": {
       "__type__": "cc.Vec2",
       "x": 0,
-      "y": 75
+      "y": 50
     },
     "_size": {
       "__type__": "cc.Size",
-      "width": 150,
-      "height": 150
+      "width": 80,
+      "height": 100
     },
     "_id": ""
   },