Add Pagefind search functionality and fix missing images

- Installed Pagefind static search indexing
- Created search page with custom dark theme styling
- Added search to main navigation menu
- Updated deploy script to include Pagefind indexing
- Fixed missing images in birthday and chick legacy pages
- Copied all missing legacy images from archive

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

content/search.md

@@ -0,0 +1,6 @@
+---
+title: "Search"
+layout: "search"
+---
+
+Search through over 25 years of blog posts: