Added nixos configs

OLD CONFIGS/nix_new/modules/nixos/networking/networkmanager.nix

@@ -0,0 +1,34 @@
+{ config, lib, pkgs, ... }:
+
+{
+  # Keep NetworkManager off (avoids nm-applet + keyring + agent ecosystem)
+  networking.networkmanager.enable = false;
+
+  # iwd provides Wi-Fi auth/roaming; configurable via networking.wireless.iwd.settings
+  networking.wireless.iwd = {
+    enable = true;
+
+    # Optional but useful defaults
+    settings = {
+      Settings = {
+        AutoConnect = true;
+      };
+      Network = {
+        EnableIPv6 = true;
+      };
+    };
+  };
+
+  # GUI (with tray indicator via `iwgtk -i`)
+  environment.systemPackages = with pkgs; [
+    iwd
+    iwgtk
+  ];
+
+  # Allow non-root Wi-Fi control (common pattern for iwd tooling)
+  users.users.henrov.extraGroups = [ "netdev" ];
+
+  # Ensure you still get IP addresses (default on NixOS is usually OK,
+  # but this makes it explicit)
+  networking.useDHCP = lib.mkDefault true;
+}