Pricing, FAQ, and a full footer

This release rounds out the core landing page. Everything is driven from src/config/site.ts, so you can rebrand without touching a component.

Added

• Pricing — a three-tier table (Hobby / Pro / Enterprise) with a highlighted “most popular” plan.
• FAQ — a lightweight <details> accordion. Zero client JavaScript.
• Logos — a “trusted by” row for social proof.
• Footer — brand blurb, link columns, and an auto-updating copyright year.

Changed

• Nav links now point at the new #pricing and #faq anchors.