Add Creative Elements templates and update index files

- Introduced new templates for catalog, checkout, contact, and error pages.
- Implemented caching headers and redirection in index.php files across various directories.
- Enhanced product and layout templates for better integration with Creative Elements.
- Added backoffice header styles and scripts for improved UI/UX in the admin panel.

modules/creativeelements/upgrade/upgrade-2.5.11.php

@@ -0,0 +1,21 @@
+<?php
+/**
+ * Creative Elements - live Theme & Page Builder
+ *
+ * @author    WebshopWorks
+ * @copyright 2019-2022 WebshopWorks.com
+ * @license   One domain support license
+ */
+
+defined('_PS_VERSION_') or die;
+
+function upgrade_module_2_5_11($module)
+{
+    Shop::isFeatureActive() && Shop::setContext(Shop::CONTEXT_ALL);
+
+    Media::clearCache();
+
+    copy(_CE_PATH_ . 'views/lib/filemanager/config.php', _PS_IMG_DIR_ . 'cms/config.php');
+
+    return $module->registerHook('actionFrontControllerAfterInit', null, 1);
+}