Add user testimonials for Nexent and AI Agent Platform from SZShowmaker/patch-1

Add user testimonials for Nexent and AI Agent Platform

Author: WMC001

doc/docs/zh/opensource-memorial-wall.md

@@ -659,3 +659,7 @@ Nexent开发者加油
 ::: info feria-tu - 2026-2-21
 一直在寻找企业级简单好用的智能体平台，Nexent是个非常值得一试的好产品，祝Nexent发展越来越好！
 :::
+
+::: info SZShowmaker - 2026-3-3
+Happy to find a easy-to-use AI Agent Platform
+:::