Add initial module files and templates for Omnibus EU Free

- Created new image file for YouTube logo.
- Added index.php files for views and JavaScript with license notice and redirect to parent directory.
- Implemented back.js for reload functionality with button event listener.
- Introduced configure.tpl template for admin configuration with documentation links and CRON settings.
- Added products-price-list.tpl for displaying product price data in a table format.
- Created index.php files for hook templates with license notice and redirect.
- Added presta_studio_omnibus_price.tpl for displaying product discount information.

modules/omnibuseufree/sql/uninstall.php

@@ -0,0 +1,24 @@
+<?php
+/**
+*
+* NOTICE OF LICENSE
+*
+* This source file is subject to the Apache License, Version 2.0
+* that is bundled with this package in the file LICENSE.
+* It is also available through the world-wide-web at this URL:
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+*  @author    presta.studio
+*  @copyright Copyright (c) 2023 presta.studio
+*  @license   http://www.apache.org/licenses/LICENSE-2.0  Apache License, Version 2.0
+*/
+
+$sql = array();
+
+$sql[] = 'DROP TABLE IF EXISTS `' . _DB_PREFIX_ . 'omnibus_eu_free`';
+
+foreach ($sql as $query) {
+    if (Db::getInstance()->execute($query) == false) {
+        return false;
+    }
+}