Add RSS/Atom Feed

[sondt99]

Blogs should provide an RSS or Atom feed for readers to subscribe and get updates.

Proposed Solution

Create an API route or static file generation for RSS feed:

// src/pages/api/feed.xml.ts or src/pages/feed.xml.ts
// Include:
// - Blog title and description
// - Last 10-20 posts with:
//   - Title, link, publish date
//   - Excerpt or full content
//   - Author info

Use packages like feed or rss to generate proper XML.

Acceptance Criteria

• RSS/Atom feed available at /feed.xml or /rss.xml
• Feed includes all blog posts
• Feed link added to site header