支持markdown公式渲染

[zhangdengjie]

Prerequisites

• I have searched for related issues in the Issues list.
• This is a feature related to Halo. If it is not an issue with the project itself, it is recommended to submit it in the Discussions.
• If it is a feature suggestion for plugins and themes, please submit it in the respective plugin and theme repositories.

Your current Halo version

2.21.8

Describe this feature

类似于这样的公式
$$
10\text{nm} \sim 400\text{nm}
$$

Additional information

No response

[ruibaby]

https://www.halo.run/store/apps/app-ISCsX