feat(map): 新增可动态加载的收集物UI组件

- 添加 MGetComp 组件用于管理单个收集物的显示逻辑
- 创建 get.prefab 预制体作为收集物UI模板
- 重构 MissionGetsComp，移除硬编码节点引用，改为动态加载
- 支持通过 load_hui 方法按需加载收集物UI实例

assets/resources/game/gui/get.prefab

@@ -1,7 +1,7 @@
 [
   {
     "__type__": "cc.Prefab",
-    "_name": "icon",
+    "_name": "get",
     "_objFlags": 0,
     "__editorExtras__": {},
     "_native": "",
@@ -13,7 +13,7 @@
   },
   {
     "__type__": "cc.Node",
-    "_name": "icon",
+    "_name": "get",
     "_objFlags": 0,
     "__editorExtras__": {},
     "_parent": null,
@@ -41,10 +41,13 @@
       },
       {
         "__id__": 36
+      },
+      {
+        "__id__": 39
       }
     ],
     "_prefab": {
-      "__id__": 39
+      "__id__": 41
     },
     "_lpos": {
       "__type__": "cc.Vec3",
@@ -900,6 +903,24 @@
     "handler": "",
     "customEventData": ""
   },
+  {
+    "__type__": "7ddd1IfGRhO7a2b66ov5bYG",
+    "_name": "",
+    "_objFlags": 0,
+    "__editorExtras__": {},
+    "node": {
+      "__id__": 1
+    },
+    "_enabled": true,
+    "__prefab": {
+      "__id__": 40
+    },
+    "_id": ""
+  },
+  {
+    "__type__": "cc.CompPrefabInfo",
+    "fileId": "c89eW5WlxFUokvJRFAfrSA"
+  },
   {
     "__type__": "cc.PrefabInfo",
     "root": {

assets/resources/game/gui/get.prefab.meta

@@ -8,6 +8,6 @@
   ],
   "subMetas": {},
   "userData": {
-    "syncNodeName": "icon"
+    "syncNodeName": "get"
   }
 }