as shown in the figure, I want to use this jekyll theme, on GitHub pages to make the Reading List on the left appear the directory bar that makes markdown files like the Amazing Blog on the right, and I need to use a new folder to place other post markdown files for classified display. How to achieve this function?
GitHub repo link for this jekyll theme: https://github.com/chrisbobbe.
GitHub pages link: https://chrisbobbe.github.io/.