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-register-class.md

@@ -0,0 +1,65 @@
+registerClass()
+
+register a class for use in the templates
+
+Description
+===========
+
+void
+
+registerClass
+
+string
+
+class\_name
+
+string
+
+class\_impl
+
+Smarty allows you to access static classes from templates as long as the
+[Security Policy](#advanced.features.security) does not tell it
+otherwise. If security is enabled, classes registered with
+`registerClass()` are accessible to templates.
+
+
+    <?php
+
+    class Bar {
+      $property = "hello world";
+    }
+
+    $smarty = new Smarty();
+    $smarty->registerClass("Foo", "Bar");
+
+       
+
+
+    {* Smarty will access this class as long as it's not prohibited by security *}
+    {Bar::$property}
+    {* Foo translates to the real class Bar *}
+    {Foo::$property}
+
+       
+
+
+    <?php
+    namespace my\php\application {
+      class Bar {
+        $property = "hello world";
+      }
+    }
+
+    $smarty = new Smarty();
+    $smarty->registerClass("Foo", "\my\php\application\Bar");
+
+       
+
+
+    {* Foo translates to the real class \my\php\application\Bar *}
+    {Foo::$property}
+
+       
+
+See also [`registerObject()`](#api.register.object), and
+[Security](#advanced.features.security).