DYI: Start complete subsection for docs
Anything that is too complex, are the UI is hard to get right, should link to this section, so we can properly document.
This starting page keeps and extends some wording that was removed from DYI a couple of days ago.
Fixes: https://gitlab.science.ru.nl/cncz/userdb-cli/-/issues/1004
Signed-off-by: Miek Gieben miek.gieben@ru.nl