Add initial files and templates for Omnibus EU Free module

- Added yt_logo.png image for branding.
- Created index.php for views and templates with license notice and redirection.
- Implemented back.js for reload functionality with event listener.
- Developed configure.tpl for admin configuration panel with documentation links.
- Established products-price-list.tpl for displaying product pricing information.
- Created presta_studio_omnibus_price.tpl for displaying price history and discounts.
- Added index.php files in various directories for consistent redirection and license notice.

modules/omnibuseufree/vendor/composer/autoload_classmap.php

@@ -0,0 +1,12 @@
+<?php
+
+// autoload_classmap.php @generated by Composer
+
+$vendorDir = dirname(__DIR__);
+$baseDir = dirname($vendorDir);
+
+return array(
+    'Composer\\InstalledVersions' => $vendorDir . '/composer/InstalledVersions.php',
+    'Omnibus\\Compatibility\\PrestashopCompatibility' => $baseDir . '/src/compatibility/PrestashopCompatibility.php',
+    'Omnibus\\Controller\\MenuController' => $baseDir . '/src/controller/MenuController.php',
+);