move config to modules

config/i3.nix

@@ -0,0 +1,22 @@
+{ config, pkgs, ... }:
+{
+imports = [
+  ./xorg.nix
+];
+services.xserver.windowManager.i3.enable = true;
+
+environment.systemPackages = with pkgs; [
+  # might use picom as a compositor
+  lightdm-slick-greeter
+  rofi
+  i3status
+  i3lock
+  xfce.xfce4-power-manager
+  networkmanager
+  networkmanagerapplet
+  networkmanager-openvpn
+  networkmanager-openconnect
+  libnotify
+  dunst
+];
+}

config/locale.nix

@@ -0,0 +1,27 @@
+{ config, pkgs, ... }:
+
+{
+  # Set your time zone.
+  time.timeZone = "Europe/Berlin";
+
+  # Select internationalisation properties.
+  i18n.defaultLocale = "de_DE.UTF-8";
+
+  i18n.extraLocaleSettings = {
+    LANGUAGE = "en_US.UTF-8";
+    LC_ALL = "de_DE.UTF-8";
+    LC_ADDRESS = "de_DE.UTF-8";
+    LC_IDENTIFICATION = "de_DE.UTF-8";
+    LC_MEASUREMENT = "de_DE.UTF-8";
+    LC_MONETARY = "de_DE.UTF-8";
+    LC_NAME = "de_DE.UTF-8";
+    LC_NUMERIC = "de_DE.UTF-8";
+    LC_PAPER = "de_DE.UTF-8";
+    LC_TELEPHONE = "de_DE.UTF-8";
+    LC_TIME = "de_DE.UTF-8";
+  };
+  services.xserver.layout = "de";
+
+  # Configure console keymap
+  console.keyMap = "de";
+}

config/xorg.nix

@@ -0,0 +1,11 @@
+{ config, pkgs, ... }:
+{
+# Enable the X11 windowing system.
+services.xserver = {
+  enable = true;
+  displayManager.lightdm.enable = true;
+  xkbVariant = "";
+  autoRepeatDelay = 200;
+  autoRepeatInterval = 35;
+};
+}