I need a bespoke WordPress plugin that adds full e-commerce capability to a site without relying on heavy external suites. The core purpose is e-commerce integration, and the build has to cover the following features: • Payment gateway integration • Product management • Cart and checkout process You’re free to recommend the most reliable gateway (PayPal, Stripe, Square or another) and outline why it best matches security and regional coverage requirements. The plugin should let me create, edit and categorise products directly from the WordPress dashboard, track stock, apply prices or discounts, and display items with clean, responsive templates. A seamless cart experience is essential—buyers must be able to add, update or remove items, review totals, then move through a secure checkout flow that completes the order and sends confirmation emails. Please keep the code lean, namespaced and ready for translation. Compatibility with the latest stable WordPress release is mandatory. Deliver the installable .zip, documented functions/hooks, and a brief setup guide so I can test everything on a staging site before sign-off.