chore(deps): 添加 unity-mcp 包依赖

Co-authored-by: Cursor <cursoragent@cursor.com>

Packages/manifest.json

@@ -1,5 +1,6 @@
 {
   "dependencies": {
+    "com.coplaydev.unity-mcp": "https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#beta",
     "com.unity.addressables": "1.21.21",
     "com.unity.cinemachine": "2.9.7",
     "com.unity.collab-proxy": "2.0.5",

Packages/packages-lock.json

@@ -1,5 +1,14 @@
 {
   "dependencies": {
+    "com.coplaydev.unity-mcp": {
+      "version": "https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#beta",
+      "depth": 0,
+      "source": "git",
+      "dependencies": {
+        "com.unity.nuget.newtonsoft-json": "3.0.2"
+      },
+      "hash": "560866569a05b0b6e9e5f4cc6940d05034044b91"
+    },
     "com.unity.2d.animation": {
       "version": "9.0.3",
       "depth": 1,