Katex support

If you want to use Katex in your site, please use @iktakahiro/markdown-it-katex which forks from markdown-it-katex for better render quality. (Support higher Katex version)

First, install @iktakahiro/markdown-it-katex

npm install @iktakahiro/markdown-it-katex

Edit your site's _config.yml

markdown:
  ...
  plugins:
    ...
    - '@iktakahiro/markdown-it-katex'

Katex supported functions, see: https://katex.org/docs/supported.html