FEATURE: simplify template handler - move un/install and registerAdminMenu into base class

templates/Base/OnePage/Handlers/OnePage.php

@@ -2,7 +2,33 @@
 namespace Templates\Base\OnePage\Handlers;
 
 use App\Handlers\Contracts\TemplateHandler;
+use App\Models\Module;
+use App\Models\User;
 
 abstract class OnePage implements TemplateHandler
 {
+    /**
+     * Register admin menu (or multiple ones)
+     *
+     * This cannot be in ServiceProvider because Session is started at middleware. And ServiceProvider is called before
+     * starting any middleware..
+     *
+     * @param User $user model of logged user
+     */
+    public static function registerAdminMenu(User $user)
+    {
+    }
+
+    /**
+     * Install module
+     *
+     * @return mixed
+     */
+    public static function install()
+    {
+    }
+
+    public static function uninstall(Module $template)
+    {
+    }
 }