Include Monaco for Powerline

This probably shouldn't be included within a git repo, but it's small enough that we're not going to fret about it too much.

home/desktop.nix

@@ -1,6 +1,9 @@
 { config, lib, pkgs, ... }:
 
 {
+  # Custom packages.
+  nixpkgs.overlays = [ (import ../pkgs/default.nix) ];
+
   # Commonly used packages.
   home.packages = with pkgs; [
     binwalk
@@ -17,6 +20,7 @@
     jdk
     jq
     meld
+    monaco-powerline
     mtr
     ncdu
     neofetch