Add option to set a global font across all programs

[phucisstupid]

Since Catppuccin Nix users often aim for a fully themed and cohesive setup, it would be helpful to have an option to configure a single global font that applies across all supported programs (e.g., terminal, GTK apps, Wayland, etc.). This can't be done by stylix because It's conflict with catppuccin nix. Example config:

{
  catppuccin.font = "JetBrainsMono Nerd Font";
}

[isabelroses]

There is currently only 3 modules that need a font¹. And the grub module you probably don't want that font for.

But I do see the purpose of what you want.

[phucisstupid]

There is currently only 3 modules that need a font

No, a lot. Example: ghostty, wezterm, alacritty, kitty,...

[isabelroses]

There is currently only 3 modules that need a font

No, a lot. Example: ghostty, wezterm, alacritty, kitty,...

I should have been clearer sorry. I mean that we need to configure by replacing lines from the upstream files.

[theNoof]

Would also want that, fonts are only reason why i still use stylix. do i understand it right that this already exists in some kind?