Sébastien, I suggest naming the source package gnome-shell-frippery. This matches the upstream tarball naming and what other distros have done. https://repology.org/project/gnome-shell-frippery/versions
If you agree, I can create the Salsa repo for you under the Debian GNOME team shell-extensions subproject. And I can sponsor the initial upload for you. You can also close https://bugs.debian.org/648485 with your upload. People have been wanting this to be packaged for a long time! It's too late for this package to make it into Debian 13, but it could be accepted into Unstable. https://release.debian.org/testing/freeze_policy.html#soft Thank you, Jeremy Bícha
