Added initial files

hosts/desktops/common/users.nix

@@ -0,0 +1,16 @@
+{ config, pkgs, lib, ... }:
+
+{
+  environment.sessionVariables = rec {
+    KDEHOME = "$XDG_CONFIG_HOME/kde4"; # Stops kde from placing a .kde4 folder in the home dir
+  };
+
+  users.users.user = {
+    description = "William";
+    extraGroups = [
+      "libvirtd"
+      "uaccess" # Needed for HID dev
+      "dialout" # Needed for arduino dev
+    ];
+  };
+}