Integrate blog posts on homepage and add related posts section #43
Description
The homepage currently shows placeholder blog cards (the "123" loop). Replace that with real data:
- Query the 3 most recent live BlogPage objects from Wagtail
- Display header image, date, author, title, excerpt
- Maintain the current Tailwind grid styling
- Link to actual blog posts
Bonus: We could also add a "Related Posts" section at the bottom of individual blog and event pages. Show 3 related items based on tag
overlap (fallback to recent if no tags match).