add core configuration

home-manager/modules/ghostty/default.nix

@@ -0,0 +1,37 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  cfg = config.lily.ghostty;
+in {
+  options.lily.ghostty = {
+    enable = lib.mkEnableOption "activate ghostty";
+  };
+
+  config = lib.mkIf cfg.enable {
+    home.file.".config/ghostty/shaders" = {
+      source = ./shaders;
+      recursive = true;
+    };
+    programs.ghostty = {
+      enable = true;
+
+      settings = {
+        background-blur-radius = 0;
+        #theme = "dark:catppuccin-mocha,light:catppuccin-latte";
+        window-theme = "dark";
+        background-opacity = 0.75;
+        minimum-contrast = 1.1;
+        window-padding-x = 5;
+        window-padding-y = 5;
+        gtk-adwaita = false;
+        gtk-titlebar = false;
+        #       custom-shader = "shaders/crt.glsl";
+        #      custom-shader = "shaders/glow.glsl";
+        confirm-close-surface = false;
+        custom-shader-animation = true;
+      };
+    };
+  };
+}