system: add config for networking and hardware

modules/system/os/networking/module.nix

@@ -0,0 +1,21 @@
+{config, ...}: let
+  inherit (config.modules.other.system) username;
+in {
+  imports = [
+    ./networkmanager.nix
+  ];
+  networking = {
+    enableIPv6 = true;
+    nameservers = [
+      # quad9 DNS
+      "9.9.9.9"
+      "2620::fe::fe"
+    ];
+  };
+  services.resolved = {
+    enable = true;
+    # quad9 dns
+    fallbackDns = ["9.9.9.9" "2620::fe::fe"];
+  };
+  users.users.${username}.extraGroups = ["networkmanager"];
+}