Added Cage as interface

nixos/roles/cage.nix

@@ -0,0 +1,48 @@
+{ pkgs, ... }:
+let
+  kiosk-url = "https://www.cyperpunk.de";
+  kiosk-user = "kiosk";
+  kiosk-program =
+    "${pkgs.chromium}/bin/chromium "
+    + "--kiosk "
+    + "--app=${kiosk-url} "
+    + "--noerrdialogs "
+    + "--disable-infobars "
+    + "--no-first-run "
+    + "--disable-translate "
+    + "--disable-features=TranslateUI "
+    + "--autoplay-policy=no-user-gesture-required "
+    + "--enable-features=WebUIDarkMode "
+    + "--force-dark-mode ";
+in
+{
+  environment = {
+    systemPackages = [
+      pkgs.cage
+      pkgs.chromium
+    ];
+
+    variables = {
+      XKB_DEFAULT_LAYOUT = "de";
+      XKB_DEFAULT_VARIANT = "mac";
+      XKB_DEFAULT_OPTIONS = "terminate:ctrl_alt_bksp";
+    };
+
+    loginShellInit = ''
+      if [ "$(tty)" = "/dev/tty1" ] && [ "$USER" = "${kiosk-user}" ]; then
+        export XDG_CONFIG_HOME=/home/${kiosk-user}/.config
+        export XDG_CACHE_HOME=/home/${kiosk-user}/.cache
+        exec ${pkgs.cage}/bin/cage -s -- ${kiosk-program}
+      fi
+    '';
+  };
+
+  services.getty.autologinUser = kiosk-user;
+
+  users.users.${kiosk-user} = {
+    isNormalUser = true;
+    home = "/home/${kiosk-user}";
+    createHome = true;
+  };
+
+}