### Is your feature request related to a problem? I'd like to write intro/outro parts that may not need a 3-level subdivision between part, chapter and lesson. Currently, I need multiple levels so my introduction page maybe `/getting-started/intro/about", instead of just `/getting-started`. The UX is not as smooth as it could when it comes to writing proper course introductions or conclusions. ### Describe the solution you'd like. Allow having 2-levels or 1-level hierarchy. ``` intro |_ _files |_ content.md |_ meta.md short-part |_ chapter-1 |__ _files |__ content.md ``` ### Describe alternatives you've considered. This seems a little change but I understand how this can affect UX. - We could allow having content in parts and chapters ? Maybe have special "intro.md"/"ending.md" files ? - Or keep content only in type "lesson", but allow a lesson to live outside of a chapter or part ? In this approach, as a default, we write lessons in a tutorial. Optionally, we can move lessons to a chapter. And optionnaly, we can move chapters into parts. - We could instead craft independant Astro pages, and focus on linking them to specific courses via meta data? For instance adding an "outro: /some-page" field to the chapter definition or something alike. But seems convoluted, mixing the mental model of Astro and the mental model of Tutorialkit. ### Additional context The file `packages/astro/src/default/utils/routes.ts` seems to be responsible to route creation and could be tweaked quite easily. However such a change may have consequences on the mental model around parts/chapters/lessons in other places.