[Bug Report]: work quque的工作队列和默认工作队列说明文档缺失

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### 日志

```shell
内核编程文档中work quque的工作队列和默认工作队列说明文档缺失，请补充说明其区别及使用方法。
https://g.alicdn.com/alios-things-3.3/doc/aos_kernel.html?spm=a2cti.24227744.0.0.61ee666cUrczBt#autotoc_md148
```

Start with the kernel programming documentation at the linked URL, using the work queue section identified by autotoc_md148. Document the distinction between the work queue and default work queue, including their usage methods. Done means the referenced documentation clearly covers both topics.

Written by the indexing model from the issue text.