Bunch More Packages

- Add thunar file manager to dwm
- Add nitrogen wallpaper setter to dwm
- Add rclone, sweethome 3D, mangal, qalculate-gtk, octave, and
  qbittorrent packages

system/utilities/cloud.nix

@@ -0,0 +1,7 @@
+{ config, lib, pkgs, userSettings, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    rclone
+  ];
+}