Add sitemap and robots.txt, update home page stats to static values, and fix prayer language detection

- Create sitemap.xml with internationalized routes and proper SEO attributes
- Create robots.txt with appropriate crawling rules for public/private content
- Update home page stats to show static values (1,416 Bible versions, 17M+ verses)
- Remove live stats API calls to eliminate loading delays
- Add /api/stats endpoint for potential future use
- Fix Romanian prayers incorrectly tagged as English in database
- Add missing AZURE_OPENAI_DEPLOYMENT to .env.example
- Update translation keys for Bible versions stat
- Add sample English prayer requests to populate prayer wall

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

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

public/robots.txt

@@ -0,0 +1,39 @@
+User-agent: *
+Allow: /
+
+# Allow access to public pages
+Allow: /en/
+Allow: /ro/
+Allow: /en/bible
+Allow: /ro/bible
+Allow: /en/prayers
+Allow: /ro/prayers
+Allow: /en/search
+Allow: /ro/search
+Allow: /en/contact
+Allow: /ro/contact
+
+# Disallow admin pages
+Disallow: /admin/
+
+# Disallow private user pages
+Disallow: /*/dashboard
+Disallow: /*/profile
+Disallow: /*/settings
+Disallow: /*/bookmarks
+
+# Disallow API endpoints
+Disallow: /api/
+
+# Disallow authentication pages from indexing
+Disallow: /*/login
+Disallow: /*/auth/
+
+# Allow static assets
+Allow: /_next/static/
+Allow: /favicon.ico
+Allow: /images/
+Allow: /icons/
+
+# Sitemap location
+Sitemap: https://biblicalguide.com/sitemap.xml