chore：清理空的gitkeep文件和临时文件

- 删除不再需要的.gitkeep占位文件
- 清理开发过程中的临时测试文件

package.json

@@ -28,12 +28,16 @@
     "@nestjs/platform-express": "^10.4.20",
     "@nestjs/platform-socket.io": "^10.4.20",
     "@nestjs/schedule": "^4.1.2",
+    "@nestjs/typeorm": "^11.0.0",
     "@nestjs/websockets": "^10.4.20",
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.14.3",
+    "mysql2": "^3.16.0",
     "nestjs-pino": "^4.5.0",
     "pino": "^10.1.0",
-
     "reflect-metadata": "^0.1.14",
-    "rxjs": "^7.8.2"
+    "rxjs": "^7.8.2",
+    "typeorm": "^0.3.28"
   },
   "devDependencies": {
     "@nestjs/cli": "^10.4.9",