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/composer.json

@@ -0,0 +1,14 @@
+{
+    "name": "prestastudio/omnibus",
+    "description": "Module for Omnibus Directive by the European Union law.",
+    "autoload": {
+      "psr-4": {
+        "Omnibus\\Controller\\": "src/controller/",
+        "Omnibus\\Compatibility\\": "src/compatibility/"
+      }
+    },
+    "config": {
+        "prepend-autoloader": false
+    },
+    "type": "prestashop-module"
+  }