Has a developer I would like to create a contentset via aio cli

**Is your feature request related to a problem? Please describe.**
Currently with aio cli we can get or delete a contentset, but I don't see a way to create the content set with the command line

**Describe the solution you'd like**
As the API allow to create a contentset, it should be possible to implement it in the aio cli

**Describe alternatives you've considered**
I don't see any alternative.

**Additional context**
I need to create quickly a contentset based on some diff tool report in order to speed up what need to be re-sync.

首先检查现有的用于获取和删除 contentset 的 aio CLI 命令，然后将其与 API 的 contentset 创建操作进行比较。当 CLI 能够根据该 API 所需的信息创建 contentset，并支持已报告的 diff-tool 工作流时，即视为完成。

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