Add Italian and German translations for OmniPrice module, implement cron job controller, and create front index file

- Added Italian translations for various module strings in it.php.
- Added German translations for various module strings in de.php.
- Implemented Gm_OmniPriceCronModuleFrontController to handle cron actions such as indexing, cleanup, and filling missing cache.
- Created index.php file to redirect access to the module's front controller.

modules/gm_omniprice/cron.php

@@ -3,7 +3,9 @@
 $start = microtime(true);
 require('template.php');
 require_once(dirname(__FILE__) . '/../../config/config.inc.php');
-
+if (Module::isEnabled('groupinc')) {
+    require_once(dirname(__FILE__) . '/../../init.php');
+}
 $omni = Module::getInstanceByName('gm_omniprice');
 $token = Tools::getValue('token');
 $comparedToken = Tools::getAdminToken('gm_omniprice');