ghostty: add cursor shader

modules/user/ghostty.nix

@@ -1,11 +1,23 @@
-{
+{ config, pkgs, ... }: let
+  ghosttyWithGL = (config.lib.nixGL.wrap pkgs.ghostty);
+  shaders = pkgs.fetchFromGitHub {
+    owner = "sahaj-b";
+    repo = "ghostty-cursor-shaders";
+    rev = "06d4e90fb5410e9c4d0b3131584060adddf89406";
+    hash = "sha256-G/UIr1bKnxn1AcHl/4FL/jou6b7M2VeREslYVELxdmw=";
+  };
+in {
   programs.ghostty = {
     enable = true;
     enableZshIntegration = true;
+    package = ghosttyWithGL;
+
     settings = {
       confirm-close-surface = false;
       copy-on-select = false;
       title-report = true;
+
+      custom-shader = "${shaders}/cursor_warp.glsl";
     };
   };
 }