Added comma + nix index database. Removed unused flake input

system/desktop/comma.nix

@@ -0,0 +1,13 @@
+{
+  config,
+  lib,
+  ...
+}: {
+  programs =
+    lib.mkIf config.niksos.desktop.enable
+    {
+      command-not-found.enable = false;
+      nix-index.enable = true;
+      nix-index-database.comma.enable = true;
+    };
+}

system/desktop/default.nix

@@ -9,6 +9,7 @@
   inherit (lib) mkIf optional;
 in {
   imports = [
+    ./comma.nix
     ./greetd.nix
     ./hyprland.nix
     ./pipewire.nix