Add configuration for warranty and payment options, update email templates, and implement marketing file migration

- Created STEP3.txt for business rules and payment configurations.
- Modified listPartner function parameter order in functions.php.
- Updated invoice email template to reflect new contact details.
- Revised PDF invoice template to include updated contact information.
- Added user session checks in index.php for improved security.
- Introduced marketing_migrate.php to migrate existing marketing files to the database.
- Increased max-height of content blocks in admin.css for better UI.

assets/functions.php

@@ -2848,7 +2848,7 @@ function serviceReport($history, $request, $country_code)
 //------------------------------------------
 // LIST PARTNER 
 //------------------------------------------
-function listPartner($partnertype, $user_right = null, $input, $required)
+function listPartner($partnertype, $input, $required, $user_right = null)
 {
   include dirname(__FILE__,2).'/settings/settings_redirector.php';