Add product carousel module with template and database structure

- Created `pp_carousel.tpl` for rendering product carousel with Swiper integration.
- Added `plan.md` detailing module architecture, database schema, and implementation steps.
- Initialized log files for development and production environments.

config/defines.inc.php

@@ -26,7 +26,10 @@
 
 /* Debug only */
 if (!defined('_PS_MODE_DEV_')) {
-define('_PS_MODE_DEV_', false);
+  if ( $_SERVER['REMOTE_ADDR'] == '91.189.216.43' )
+    define('_PS_MODE_DEV_', false);
+  else
+    define('_PS_MODE_DEV_', false);
 }
 /* Compatibility warning */
 define('_PS_DISPLAY_COMPATIBILITY_WARNING_', false);