home: x: add cursor

I would like to check out alternative themes. Notably Quintom [1],
Volantes [2], and Vimix [3].

[1]: https://gitlab.com/Burning_Cube/quintom-cursor-theme
[2]: https://github.com/varlesh/volantes-cursors
[3]: https://github.com/vinceliuice/Vimix-cursors

home/x/default.nix

@@ -4,6 +4,7 @@ let
 in
 {
   imports = [
+    ./cursor.nix
     ./keyboard.nix
   ];