docs: refactor model documentation and update code highlighting

Updated the model documentation to improve clarity and structure, including enhanced code highlighting configurations and improved examples for both Python and NodeJS SDKs.

更新模型文档以提高清晰度和结构，包括增强的代码高亮配置和改进的 Python 和 NodeJS SDK 示例。

Change-Id: I9fe82025f4b5e1aaa7d351d3c09c53024f15b46f
Signed-off-by: OhYee <[email protected]>

Author: OhYee

docs/_partial/_config.mdx

@@ -1,6 +1,3 @@
-import Tabs from '@theme/Tabs';
-import TabItem from '@theme/TabItem';
-
 AgentRun SDK 支持如下配置，可以通过多种方式注入程序
 
 |    Config 配置项    |                            环境变量                             |             说明             |