support slides using markdown

[houminz]

reference:

• https://github.com/wowchemy/starter-hugo-markdown-slides
• https://github.com/wowchemy/wowchemy-hugo-themes

[houminz]

Possible solutions to support slides using markdown in hugo:

• Reveal.JS: wowochemy use Reaveal.JS
  • https://github.com/wowchemy/wowchemy-hugo-themes/tree/main/modules/wowchemy-plugin-reveal
  • https://wowchemy.com/docs/content/slides/
• Marp
• SlideV
• Compare with these tools: https://www.youtube.com/watch?v=owx5KoiqFBs