Add all of iogamaster modules

modules/nixos/system/xkb/default.nix

@@ -0,0 +1,24 @@
+{
+  options,
+  config,
+  lib,
+  ...
+}:
+with lib;
+with lib.frajul;
+let
+  cfg = config.system.xkb;
+in
+{
+  options.system.xkb = with types; {
+    enable = mkBoolOpt false "Whether or not to configure xkb.";
+  };
+
+  config = mkIf cfg.enable {
+    console.useXkbConfig = true;
+    services.xserver = {
+      xkb.layout = "de";
+      # xkb.xkbOptions = "caps:escape";
+    };
+  };
+}