Zuplo renames Free plan to Builder, adds $25 custom domains add-on

Free plan renamed to Builder with restructured pricing: free base tier ($0/month) + optional custom domains add-on ($25/month for 2 domains) [Builder plan tagline changed from 'Go live with 2 custom domains (maximum) and scale up to 5M requests. Designed for hobbyists and solo-entrepreneurs.' to 'For prototyping and starter projects. Ship your first API in minutes. Add custom domains when you're ready for production.'; Enterprise plan tagline changed from 'Build a custom agreement with the add-ons you need. Enterprise pricing starts at $1000 per month on an annual contract.' to 'For scaling teams and mission-critical APIs. Starting at $1,000/mo annually. Volume discounts and custom SLAs available.']