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/designers/language-custom-functions/index.md

@@ -0,0 +1,19 @@
+# Custom Functions
+
+Smarty comes with several custom plugin functions that you can use in
+the templates.
+
+- [{counter}](language-function-counter.md)
+- [{cycle}](language-function-cycle.md)
+- [{eval}](language-function-eval.md)
+- [{fetch}](language-function-fetch.md)
+- [{html_checkboxes}](language-function-html-checkboxes.md)
+- [{html_image}](language-function-html-image.md)
+- [{html_options}](language-function-html-options.md)
+- [{html_radios}](language-function-html-radios.md)
+- [{html_select_date}](language-function-html-select-date.md)
+- [{html_select_time}](language-function-html-select-time.md)
+- [{html_table}](language-function-html-table.md)
+- [{mailto}](language-function-mailto.md)
+- [{math}](language-function-math.md)
+- [{textformat}](language-function-textformat.md)