Summary: ParityDeals adds PPP Pricing link

Why It Matters: This change makes it easier for people to find information about PPP pricing. It also adds a new link to a buying power calculator.

What Changed:

• The navigation link "Pricing" changed to "PPP Pricing" and now links to /ppp-pricing.
• A new link to "Pricing" was added in the navigation.
• A new link to a "buying power calculator" was added to the "Tools" section in the footer.
• The main heading changed from "One billing system for all your pricing logic" to "Stripe billing made easy".
• The sub-heading changed from "ParityDeals is the revenue OS built directly on Stripe so you can launch, localize, and optimize any pricing model without touching code" to "Easiest way to launch subscriptions and usage-based billing on Stripe. Launch in minutes, No webhook, No custom code."
• A "Learn more" link was added to the "PRICE LOCALIZATION" section, pointing to /ppp-pricing.
• The section heading "Ready to ship pricing like product?" changed to "Own your pricing. Ship changes in minutes".
• The "Features" section in the footer changed "PPP discounts" to "PPP pricing" and added "Usage-based billing".