feat(storefront): update FAQ and legal documentation

- Added new FAQ sections for account security, ordering and checkout, returns, shipping, and contact information.
- Introduced legal documents including privacy policy, terms of service, data protection, and general terms and conditions.
- Updated package dependencies to include gray-matter and remark-gfm for enhanced markdown support.

apps/storefront/src/components/sections/hompepage/newsletter/NewsletterSection.tsx

@@ -17,6 +17,7 @@ function EnvelopeIcon({ className }: { className?: string }) {
 export function NewsletterSection() {
   return (
     <section
+      id="newsletter"
       aria-label="Newsletter signup"
       className="relative max-w-7xl mx-auto w-full px-4 md:px-8 mb-12"
     >