chore：更新项目依赖和 TypeScript 配置

- 添加测试相关依赖：Jest、@nestjs/testing、ts-jest
- 更新 TypeScript 配置支持 Jest 类型定义
- 完善开发环境工具链配置

tsconfig.json

@@ -17,7 +17,8 @@
     "outDir": "./dist",
     "baseUrl": "./",
     "incremental": true,
-    "strictNullChecks": false
+    "strictNullChecks": false,
+    "types": ["jest", "node"]
   },
   "include": ["src/**/*"],
   "exclude": ["node_modules", "dist"]