[NEW] Debian packages for Debian/bookworm / v12

[mika]

Debian 12, codename bookworm, will be the upcoming Debian/stable release and its so called freeze is coming closer (see https://release.debian.org/bookworm/freeze_policy.html for details).

It would be great, if according package builds of keydb could be provided at https://download.keydb.dev/pkg/open_source/deb/, so folks working on/with Debian based systems could ensure that everything is ready for bookworm.

Thanks for consideration!