add default theme

kernel/modules/themes/ThemesModule.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace kernel\modules\themes;
+
+use kernel\Module;
+use kernel\modules\menu\service\MenuService;
+
+class ThemesModule extends Module
+{
+    public MenuService $menuService;
+    public function __construct()
+    {
+        $this->menuService = new MenuService();
+    }
+
+    /**
+     * @throws \Exception
+     */
+    public function init(): void
+    {
+        $this->menuService->createItem([
+            "label" => "Темы сайта",
+            "url" => "/admin/settings/themes",
+            "slug" => "themes",
+            "parent_slug" => "settings"
+        ]);
+    }
+
+    public function deactivate(): void
+    {
+        $this->menuService->removeItemBySlug("themes");
+    }
+}