Multiple lists for multiple categories

[MrTriad]

Hi, I really like your project. Though I think that just adding the list as

• site
• site
• site
  Can be a bit restrictive for certain use case. I.E. I'd love to add the automation of upptime in a repo that collects different categories of cyber threat intelligence sources. Though forum should be keep apart from ransomgroup blogs in example.
  I'd love to see a feature like:
• main_category
  • site
  • site
• category
  • site
  • site

This could be shown as category main(i.e.) as main readme of the repo, while the other categories would have another .md files
Along the same line, on the webpage, main would be the first page, while other tabs on a sidebar could show the other categories.

I think that this would also be helpful for repos that are tracking a lot of sites(100 or such). As I saw that some of them can be quite slow at loading the resources obviously.

Thank you for the attention ^^