Recommendation is to avoid using the year nomenclature as this
information is already encoded in the git repo. Avoids needing to
repeatly update.
Also updates AUTHORS.txt from current repo with contributor names
Also fixes a bug where the pretty printer didn't insert
linebreaks for a forest (it assumed a single tree root).
Also further regularises bool and quote formatting.
For historical reasons, they are stored in mils, but using int create rounding
issues when converting to/from mils to IU in dialogs.
This is a minor but annoying issue.
Fixes#16000https://gitlab.com/kicad/code/kicad/-/issues/16000
