Move from features to option based configuration

modules/home/gtk.nix

@@ -0,0 +1,37 @@
+{ lib
+, pkgs
+, config
+, ...
+}:
+
+with lib; let
+    cfg = config.simmer.gtk;
+    gui = config.simmer.gui;
+in
+{
+    options.simmer.gtk = {
+        theme.enable = mkOption {
+            description = "Whether to enable gtk themes";
+            type = types.bool;
+            default = gui.enable;
+        };
+    };
+
+    config = {
+        gtk = mkIf cfg.enable {
+            enable = true;
+            cursorTheme = {
+                name = "phinger-cursors-dark";
+                package = pkgs.phinger-cursors;
+            };
+            iconTheme = {
+                name = "awaida-dark";
+                package = pkgs.gnome.adwaita-icon-theme;
+            };
+            theme = {
+                name = "adw-gtk3-dark";
+                package = pkgs.adw-gtk3;
+            };
+        };
+    };
+}