Czech (cs) translation update for master, including 4 new programs

Hello,

I have prepared an update of the Czech (cs) translation for the master
branch (PostgreSQL 20devel) and submitted it to the pgtranslation Redmine
as three issues (the limit is 10 attachments per issue):

Part 1: https://redmine.postgresql.org/issues/8135
Part 2: https://redmine.postgresql.org/issues/8136
Part 3: https://redmine.postgresql.org/issues/8137

Summary:

* 27 catalogs, all 100% translated, no fuzzy or untranslated messages.
Every file passes "msgfmt -o /dev/null -v -c".
* Merged against POT files generated from the current master sources;
obsolete messages were removed.
* I reviewed the existing translations and fixed typos, wrong or missing
words, inconsistent terminology and formatting problems.
* Four programs have no Czech translation in the tree yet:
pg_amcheck, pg_combinebackup, pg_verifybackup, pg_walsummary.
Besides the new po/cs.po files, "cs" needs to be added to po/LINGUAS in
these four directories.

Two questions:

1. Who coordinates the Czech translation these days? I would like to make
sure the work is not duplicated, and I am happy to continue maintaining
these files.
2. The files are based on master (20devel). If you would rather have them
for a stable branch (or only during the beta phase), please tell me and
I will rebase them onto the POT of that branch.

Thank you,
Zbyněk Vanžura
heptau(at)gmail(dot)com