Shiro相关语法增强 #1028
Description
Clear and concise description of the problem
目前Shiro支持相当多的标签外挂实现富文本（但记起来真的很难，用的话还要翻文档）
admin端依然仅支持标准的markdown提示，能否支持/后加入相关的Shiro专属提示
（就像Github的这种：
Suggested solution
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Validations
- Follow our Code of Conduct
- Read the Contributing Guide.
- Check that there isn't already an issue that request the same feature to avoid creating a duplicate.