Multiple linked .md files

[diego-betto]

Is your feature request related to a problem? Please describe.
I wanted to find out if it was possible to create a single installation with several .md files, one per course for example.

Describe the solution you'd like
The idea is to organise the various courses into subfolders, each with a .md file, and then to have a main file with the TOC of the various courses and their links.

Another point is the possibility of linking the end of a course with a link to another course.

At the moment, it seems to be possible to build the various .md files, but then it does not seem trivial to link them together (both in development and in build)

Describe alternatives you've considered
In RevealJS this is possible pointing to multiple .html files.

Thank you!