Dev-Umgebung: Kompatibilität für PHP 8.3 + Smarty 4.5.6

- Smarty 4.1.1 → 4.5.6 (behebt dynamic property deprecations)
- Core-Klassen: #[\AllowDynamicProperties] für Admin_role, base, Config,
  Customer, Customer_group, CustomerGroups, Item, Structure, website
- website.class.php: counts[parent_id] initialisieren vor ++ (PHP 8.1)
- layout.class.php: HTTP_ACCEPT_LANGUAGE mit isset-Guard
- website_init.php: session_status()-Check vor session_start
- .htaccess: HTTPS-Redirect via X-Forwarded-Proto (statt SERVER_PORT)
- themes/easyshop_advanced/media/: Parent-Theme-Assets nachgezogen
- .gitignore: smarty.4.1.1.bak ausschließen

libs/smarty/docs/programmers/api-functions/api-get-registered-object.md

@@ -0,0 +1,36 @@
+getRegisteredObject()
+
+returns a reference to a registered object
+
+Description
+===========
+
+array
+
+getRegisteredObject
+
+string
+
+object\_name
+
+This is useful from within a custom function when you need direct access
+to a [registered object](#api.register.object). See the
+[objects](#advanced.features.objects) page for more info.
+
+
+    <?php
+    function smarty_block_foo($params, $smarty)
+    {
+      if (isset($params['object'])) {
+        // get reference to registered object
+        $obj_ref = $smarty->getRegisteredObject($params['object']);
+        // use $obj_ref is now a reference to the object
+      }
+    }
+    ?>
+
+       
+
+See also [`registerObject()`](#api.register.object),
+[`unregisterObject()`](#api.unregister.object) and [objects
+page](#advanced.features.objects)