added basic system config

configuration.nix

@@ -0,0 +1,25 @@
+{ config, lib, systemSettings, ... }:
+
+{
+    imports = [ ];
+
+    time.timeZone = systemSettings.timezone;
+    
+    i18n.defaultLocale = systemSettings.locale;
+    
+    services.xserver.xkb.layout = systemSettings.kbLayout;
+
+    users.users.${systemSettings.username} = {
+        isNormalUser = true;
+        uid = 1000;
+        extraGroups = [ "wheel" "networkmanager" "video" "audio" "lp" ];
+        packages = with pkgs; [ 
+            fastfetch
+        ];
+        password = "password";
+    };
+    nixpkgs.config.allowUnfree = true;
+
+    system.stateVersion = "24.11";
+    nix.settings.experimental-features = [ "nix-command" "flakes" ];
+}