[LyX/master] German documentation of new index features

[Juergen Spitzmueller]

commit f41546d73cf37b52ae069909de43a7ae509154ba
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Tue Nov 1 14:45:37 2022 +0100

    German documentation of new index features

 lib/doc/de/UserGuide.lyx | 5307 +++++++++++++++++++++++++++++++++++++++-------
 1 files changed, 4585 insertions(+), 722 deletions(-)