Udiskie, KDE Connect, and Config Cleanup

- Move shell and font configs out of configuration.nix
  and into separate files
- Add udiskie to dwm
- Add kdeconnect for phone connection

system/utilities/default.nix

@@ -7,5 +7,6 @@
     ./miscellaneous.nix
     ./gaming.nix
     ./backups.nix
+    ./user-shell.nix
   ];
 }

system/utilities/user-shell.nix

@@ -0,0 +1,7 @@
+{ config, lib, pkgs, ... }:
+
+{
+  environment.shells = with pkgs; [ zsh ];
+  users.defaultUserShell = pkgs.zsh;
+  programs.zsh.enable = true;
+}