Add Italian and German translations for OmniPrice module and implement cron job functionality

- Added Italian translations for the OmniPrice module, covering various settings and messages.
- Implemented a new cron.php controller for handling price indexing and cleanup actions.
- Created an index.php controller to redirect access attempts to the module's front controller.
- Added German translations for the OmniPrice module, ensuring compliance with the Omnibus directive.

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');