I want to create a side navigation panel on the article page template (article_page.hbs).
It will have the Category of that article as the main link, all the sections as collapsible elements and all the articles listed inside each sections. (see the screenshot of my mockup below).

Is there a way for me to get the Category of the article + all the sections of that Category + all the articles of each of those sections inside article_page.hbs template?