Previous default value of date creates null option in gBar config and
crashed the bar, removes null as accepted option in SNIIcon* options as
that also crashes the bar. I also felt like documentation lacked so
wrote this.
Add a way to write the gBar configuration in the nix language, like many
other home manager modules, this spares, atleast nix users, from the
trouble of using a new config language and integrates it nicer into
existing home manager configs.
Add a home-manager module to simplify installation and config management
on nix systems. This greatly reduces the setup time and
makes it integrate better with other programs on nix, mainly Hyprland
which this module is based on.
