Add the x220 host

I don't have the time to split this commit

hosts/x220/default.nix

@@ -0,0 +1,75 @@
+{ pkgs, ... }:
+
+{
+  imports = [
+    ./hardware-configuration.nix
+    ./persist.nix
+    ../../home/default.nix
+
+    ../../modules/desktop/environments/river.nix
+    ../../modules/system/basic.nix
+    ../../modules/system/security.nix
+    ../../modules/desktop/apps/communication.nix
+    ../../modules/desktop/apps/multimedia.nix
+    ../../modules/system/development.nix
+    ../../modules/packages/firefox.nix
+    ../../modules/packages/zsh.nix
+    ../../modules/packages/fastfetch.nix
+  ];
+
+  boot = {
+    loader.grub = {
+      enable = true;
+      device = "/dev/sda";
+      gfxmodeEfi = "1366x768";
+    };
+    kernelPackages = pkgs.linuxPackages_xanmod_latest;
+    supportedFilesystems = [ "btrfs" ];
+  };
+
+  networking = {
+    hostName = "x220";
+    networkmanager.enable = true;
+  };
+
+  users.users.hu.extraGroups = [ "networkmanager" ];
+
+  time.timeZone = "Europe/Berlin";
+
+  i18n.defaultLocale = "en_US.UTF-8";
+  console = {
+    font = "Lat2-Terminus16";
+    keyMap = "de";
+    # useXkbConfig = true;
+  };
+
+  nixpkgs.config.allowUnfree = true;
+
+  programs.mtr.enable = true;
+  programs.gnupg.agent = {
+    enable = true;
+    enableSSHSupport = true;
+  };
+
+  security.rtkit.enable = true;
+  services.pipewire = {
+    enable = true;
+    alsa = {
+      enable = true;
+      support32Bit = true;
+    };
+    pulse.enable = true;
+    jack.enable = true;
+  };
+
+  services.tlp.enable = true;
+
+  nix = {
+    extraOptions = ''
+      experimental-features = nix-command flakes
+    '';
+  };
+
+  system.stateVersion = "24.05";
+}
+