Dear community,
bookly is a template for writing books or documents structured into parts, chapters, appendices, etc. It also provides a tufte layout.
Regarding the design, I implemented mechanisms for easily adding new languages and creating new themes. I think that bookly may be the recepient for theme creator, since we regularly see on the forum questions related to the implementation of book-like structures.
If you want to contribute to bookly, you are welcome !