Fix Review in Progress: ezy receipt generator v1.0.1

1. Removed Tested up to from main plugin PHP header — should only be in readme.txt
2. Moved inline <script> tags to proper enqueued JS files — page-clients.php, page-products.php, page-receipts.php now use wp_enqueue_script()
3. Added class_exists('FPDF') guard around bundled FPDF library to prevent conflicts with other plugins
4. Added ABSPATH guard to lib/fpdf/fpdf.php — prevents direct file access

ezy Receipt Generator v1.0.0

First Release of ezy Receipt Generator.