Convert tmux config to Nix and personalize system configuration

nixos/default.nix

@@ -15,7 +15,6 @@
   environment.systemPackages = with pkgs; [
     git
     curl
-    wget
     vim
     htop
   ];
@@ -35,10 +34,9 @@
 
   # System-wide locale
   i18n.defaultLocale = "en_US.UTF-8";
-  time.timeZone = "UTC";
+  time.timeZone = "Europe/Berlin";
 
   # Networking basics
   networking.useDHCP = lib.mkDefault true;
   networking.networkmanager.enable = lib.mkDefault false;
-
 }