docs(ecosystem): add moyanj/AList3SDK project (#287)

* Add moyanj/AList3SDK section to ecosystem index

Added a new section for moyanj/AList3SDK with details in English and Chinese.

Signed-off-by: MoYan <1561515308@qq.com>

* Fix blank line

Signed-off-by: ILoveScratch <ilovescratch@foxmail.com>

---------

Signed-off-by: MoYan <1561515308@qq.com>
Signed-off-by: ILoveScratch <ilovescratch@foxmail.com>
Co-authored-by: ILoveScratch <ilovescratch@foxmail.com>

Author: moyanj

pages/ecosystem/index.md

@@ -202,6 +202,22 @@ Free and Open Source Software licensed under the GPLv2 license.
 
 ---
 
+### [moyanj/AList3SDK ↗](https://github.com/moyanj/AList3SDK)
+
+::: en
+A high-performance Python SDK for easy interaction with OpenList/AList services. Supports both asynchronous and synchronous APIs, and provides comprehensive type annotations!
+
+Free and Open Source Software licensed under the LGPL-2.1 license.
+:::
+
+::: zh-CN
+一个高性能的 Python SDK，用于与 OpenList/AList 服务轻松交互。同时支持异步和同步 API，并提供完善的类型注解！
+
+自由开源软件，LGPL-2.1协议
+:::
+
+---
+
 ### [huancun/Openlist-EX-container ↗](https://github.com/huancun/Openlist-EX-container)
 
 ::: en