Add FAQ page

[MakMuftic]

Add a FAQ page to the product landing page (getmiso.fi) and include it in the top navigation. New designs are available in Figma. FAQ copy can be taken from the existing implementation in the miso-web app repo.

Implementation details

• Create a new FAQ page on the landing site
• Add a "FAQ" link to the top navigation
• Apply the new Figma designs for the FAQ page
• FAQ content (6 categories, 26+ Q&A items) can be sourced from miso-web repo at src/pages/Faq/Faq.tsx
  • Categories: "What is Miso", "Earning and Yields", "Funding Card Spend", "Getting Started", "Using Miso", "Safety and Trust"
• Dependent issue: once this is live, FAQ will be removed from the app repo (miso-web)

Testing details

• Verify FAQ page renders correctly with all categories and items
• Verify FAQ link appears in top navigation and routes correctly
• Test accordion/expand-collapse behavior for Q&A items

Acceptance Criteria

• FAQ page is accessible from the landing site
• FAQ link is present in the top navigation
• All existing FAQ content is present
• New Figma designs are applied
• Page is responsive (mobile + desktop)

QA Details

• Test across major browsers (Chrome, Safari, Firefox)
• Verify mobile and desktop layouts match Figma designs
• Check that navigation between FAQ and other landing pages works correctly

[MakMuftic]

Make sure we are pointing to new repo and audits; tackles also https://github.com/sprintertech/miso-web/issues/303