add helloagents link in chapter7

docs/chapter7/Chapter7-Building-Your-Agent-Framework.md

@@ -96,6 +96,7 @@ Before starting to write specific code, we need to first establish a clear archi
 To allow readers to quickly experience the complete functionality of this chapter, we provide a directly installable Python package. You can install the version corresponding to this chapter with the following command:
 
 ```bash
+# hello-agents framework code visible link: https://github.com/jjyaoao/HelloAgents
 # Python version needs to be >= 3.10
 pip install "hello-agents==0.1.1"
 ```

docs/chapter7/第七章 构建你的Agent框架.md

@@ -96,7 +96,8 @@ hello-agents/
 为了让读者能够快速体验本章的完整功能，我们提供了可直接安装的Python包。你可以通过以下命令安装本章对应的版本：
 
 ```bash
-# python版本需要>=3.10
+# hello-agents 框架代码可见链接：https://github.com/jjyaoao/HelloAgents
+# Python 版本需要>=3.10
 pip install "hello-agents==0.1.1"
 ```