Add xdg settings, cache, cleanup script

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

users/configs/rofi/default.nix

@@ -0,0 +1,10 @@
+{ user ? throw "user argument is required" }: { pkgs, ... }:
+
+{
+  home-manager.users."${user.name}" = {
+    home = {
+      packages = with pkgs; [ rofi-wayland ];
+      persistence."/cache${user.home}".directories = [ ".cache/rofi" ];
+    };
+  };
+}