Finish modularising config

There are still some things I want to change, but at least there aren't two systems now.

modules/networkmanager.nix

@@ -0,0 +1,23 @@
+{ config, lib, pkgs, ... }:
+
+{
+  options.chvp.networkmanager.enable = lib.mkOption {
+    default = false;
+    example = true;
+  };
+
+  config = lib.mkIf config.chvp.networkmanager.enable {
+    chvp.zfs.systemLinks = [
+      { path = "/etc/NetworkManager/system-connections"; type = "data"; }
+    ];
+    networking.networkmanager = {
+      enable = true;
+      wifi.macAddress = "random";
+    };
+
+    users.users.charlotte.extraGroups = [ "networkmanager" ];
+    home-manager.users.charlotte = { ... }: {
+      home.packages = with pkgs; [ networkmanagerapplet ];
+    };
+  };
+}