Math TeX support v0.1

[finisky]

Resolved: #27 支持数据公式渲染支持

Simple math support by mathjax/katex (both display and inline)

Refer to: https://note.qidong.name/2018/03/hugo-mathjax/ https://adityatelange.github.io/hugo-PaperMod/posts/math-typesetting/ https://katex.org/docs/autorender.html

Known issues:

• Systematic math js management
• Load math js when necessary, not on every page

[elkan1788]

已经在 commit-id:c38a4391 中实现，后续的其他类似第三方插件可以参考这个方式修改。