Katna for Arch Linux (latest main)

Katna Mail built from main at eabf801 for Arch Linux (x86_64).
Replaced on every push to main.

Install once:

curl -LO https://github.com/QuakeString/katna/releases/download/arch-latest/katna-git-x86_64.pkg.tar.zst
sudo pacman -U katna-git-x86_64.pkg.tar.zst

Or add it as a pacman repository, so pacman -Syu keeps it
up to date. Append to /etc/pacman.conf:

[katna]
SigLevel = Optional TrustAll
Server = https://github.com/QuakeString/katna/releases/download/arch-latest

then sudo pacman -Syu katna-git.

The package is not signed. See packaging/README.md for starting
the background service and adding an account.