Retail Self-Checkout Terminals Market Size, Share & Trends Analysis Report By Self-Scanning Technique (Laser-Based, Image-Based, RFID), By Checkout System (Modular, Carousel Units, Kiosk/Mobile Self-Checkout), By Payment Method (Debit/Credit Cards, E-Wallets, Cash Slot Machine), By Application (Supermarket, Retail Store) and By Region (North America, Europe, APAC, Middle East and Africa, LATAM) Forecasts, 2026-2034