GitLab

Main change: `page.less` is now called `layout.less` for easier
understanding.

New files: `debug.less` + `ui.less`

`typography.less` is now called `styles.less` and is located into the `setup`
folder.

NEW: a `start` file, which you can double-click to launch the
mini-server instead of going into a terminal.

cleaning in the styles + adding 1mm to paper-height in the @page statement, so that it doesn't make an empty page on Chromium