Include calcure in official Debian/Ubuntu APT repositories

[xmha97]

It would be great to have calcure available via Debian/Ubuntu APT. Currently it can only be installed via pipx or manually. An official .deb package would make installation and updates easier and safer for users.

[mschilli87]

To me this looks more like something to approach the Debian/Ubuntu maintainers with, rather than the upstream developers.

[anufrievroman]

Yes, it would be great, but to be honest I'm not sure how to do it. Typically, in this project, packaging for different distributions is done by volunteers using those distributions. If you're familiar with creation of Deb packages and even possibly adding it official repositories, help would be appreciated!