Front matter
The --front-matter (or -f) option tells mdsplit to generate a front matter for each new file. The default option
is true so you need --front-matter=false to turn it off.
This front matter includes parameters such as title, nav_order, parent, has_children, and nav_exclude for each
markdown file.
Jekyll themes can use these parameters to generate proper navigation bars, order pages, and define page titles.