调整目录结构

docs/unicloud/_sidebar.md

 * [什么是uniCloud](uniCloud/README.md)
 * [快速上手](uniCloud/quickstart.md)
-* 重要概念
+* [初始化](uniCloud/init.md)
+* [云函数](uniCloud/cf-functions.md)
+* [云数据](uniCloud/cf-database.md)
+* [云存储](uniCloud/storage.md)
+* [日志输出](uniCloud/cf-logger.md)
+<!-- * 重要概念
   * [服务空间](uniCloud/concepts/space.md)
   * [数据库](uniCloud/concepts/database.md)
-  * [云函数](uniCloud/concepts/cloudfunction.md)
-* 服务端sdk
-  * [云函数](uniCloud/cf-functions.md)
-  * [数据库](uniCloud/cf-database.md)
+  * [云函数](uniCloud/concepts/cloudfunction.md) -->
 <!--  * [云存储](uniCloud/cf-storage.md) -->
-  <!--* [身份认证](uniCloud/cf-authentication.md) -->
-  * [日志输出](uniCloud/cf-logger.md)
-* 客户端sdk
-  * [初始化](uniCloud/init.md)
-  * [云函数](uniCloud/functions.md)
-  * [云存储](uniCloud/storage.md)
-  <!-- * [登录授权](uniCloud/authentication.md) -->
+<!--* [身份认证](uniCloud/cf-authentication.md) -->
+<!-- * [登录授权](uniCloud/authentication.md) -->
 <!-- ** 权限管理-->
-  <!-- * [腾讯云](uniCloud/policy-tcb.md) -->
-  <!-- * [阿里云](uniCloud/policy-ali.md) -->
+<!-- * [腾讯云](uniCloud/policy-tcb.md) -->
+<!-- * [阿里云](uniCloud/policy-ali.md) -->
 <!-- * [FAQ](uniCloud/faq.md) -->
 <li></li>
 <div class="contact-box">