[zellij] Move to proper module

nixos/modules/programs/default.nix

@@ -1,5 +1,6 @@
 {
   imports = [
     ./home-manager
+    ./zellij
   ];
 }

nixos/modules/programs/zellij/default.nix

@@ -0,0 +1,18 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.sisyphus.programs.zellij;
+in {
+  options.sisyphus.programs.zellij.enable = lib.mkEnableOption "Zellij";
+
+  config = lib.mkIf cfg.enable {
+    environment.systemPackages = with pkgs; [
+      zellij
+    ];
+
+    fonts.fonts = with pkgs; [
+      noto-fonts
+      noto-fonts-cjk
+    ];
+  };
+}