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-clear-compiled-tpl.md

@@ -0,0 +1,44 @@
+clearCompiledTemplate()
+
+clears the compiled version of the specified template resource
+
+Description
+===========
+
+void
+
+clearCompiledTemplate
+
+string
+
+tpl\_file
+
+string
+
+compile\_id
+
+int
+
+exp\_time
+
+This clears the compiled version of the specified template resource, or
+all compiled template files if one is not specified. If you pass a
+[`$compile_id`](#variable.compile.id) only the compiled template for
+this specific [`$compile_id`](#variable.compile.id) is cleared. If you
+pass an exp\_time, then only compiled templates older than `exp_time`
+seconds are cleared, by default all compiled templates are cleared
+regardless of their age. This function is for advanced use only, not
+normally needed.
+
+
+    <?php
+    // clear a specific template resource
+    $smarty->clearCompiledTemplate('index.tpl');
+
+    // clear entire compile directory
+    $smarty->clearCompiledTemplate();
+    ?>
+
+       
+
+See also [`clearCache()`](#api.clear.cache).