Davidasix/web mvp

[DavidASix]

Builds out the initial marketing/landing site for the app using. This covers everything from the base setup through a full index page with accessibility, SEO, and structured data baked in.

• Set up Astro with Tailwind CSS v4 (Vite plugin), design tokens, and global styles
• Added shared layout, components (header, footer, store buttons), and static assets
• Built out full index page with hero, features, FAQ, waitlist form, and footer sections
• Made FAQ accordion single-open only
• Waitlist form has proper labels and unique IDs
• Added skip-to-content button and ARIA labels throughout
• Added sitemap via @astrojs/sitemap
• Centralized site metadata into src/lib/site.ts
• Added JSON-LD structured data
• SVG store badge icons moved to src/assets (Astro-optimized)