Added i3 systemwide config

user-modules/systemwide/default.nix

@@ -4,6 +4,7 @@
   imports = [
     # Import systemwide configuration files.
     ./docker.nix
+    ./i3.nix
     ./keyring.nix
     ./river.nix
     ./steam.nix

user-modules/systemwide/i3.nix

@@ -0,0 +1,26 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+
+with lib;
+let
+  enabled = any (user: user.modules.i3.enable) (attrValues config.home-manager.users);
+in
+{
+  config = mkIf enabled {
+    services.xserver = {
+      layout = "us";
+      xkbVariant = "";
+      enable = true;
+      windowManager.i3.enable = true;
+      desktopManager = {
+        xterm.enable = true;
+        noDesktop = true;
+        enableXfwm = false;
+      };
+    };
+  };
+}