chore: initialize standalone UPM package

package.json

@@ -0,0 +1,25 @@
+{
+  "name": "com.cneicy.shrink-datasaver-integration-app",
+  "version": "0.1.0",
+  "displayName": "ShrinkDataSaver - App Integration",
+  "description": "ShrinkDataSaver 与 ShrinkApp 的桥接层，提供宿主接管初始化与服务注册。",
+  "unity": "2022.3",
+  "dependencies": {
+    "com.cneicy.shrink-datasaver": "2.2.0",
+    "com.cneicy.shrink-app-core": "0.1.1",
+    "com.cysharp.unitask": "2.5.10",
+    "com.cneicy.shrink-context-core": "0.1.0"
+  },
+  "keywords": [
+    "save",
+    "integration",
+    "app",
+    "bootstrap"
+  ],
+  "author": {
+    "name": "cneicy",
+    "url": "https://git.crash.work/ShrinkSDK"
+  },
+  "documentationUrl": "https://git.crash.work/ShrinkSDK/ShrinkDataSaver.Integration.App",
+  "changelogUrl": "https://git.crash.work/ShrinkSDK/ShrinkDataSaver.Integration.App/src/branch/main/CHANGELOG.md"
+}