featmigrate from Angular to Astro static site

BREAKING CHANGE: Complete rewrite from Angular SPA to Astro

- Replace Angular 18 with Astro 5.16.7 + Tailwind CSS
- Convert all Angular components to Astro components
- Add content collections for blog with markdown support
- Setup S3 deployment with CloudFront invalidation
- Add RSS feed and sitemap generation
- Configure Prettier and Biome for code formatting
- Switch from npm to pnpm
- Remove Amplify backend (now fully static)
- Improve SEO and performance with static generation

public/robots.txt

@@ -0,0 +1,32 @@
+# robots.txt for lorenzoiovino.com
+
+User-agent: *
+Allow: /
+
+# Sitemaps
+Sitemap: https://lorenzoiovino.com/sitemap-index.xml
+Sitemap: https://lorenzoiovino.com/rss.xml
+
+# Crawl-delay (optional, adjust if needed)
+# Crawl-delay: 1
+
+# Disallow paths (if any)
+# Disallow: /admin/
+# Disallow: /private/
+
+# Allow specific bots
+User-agent: Googlebot
+Allow: /
+
+User-agent: Bingbot
+Allow: /
+
+User-agent: Slurp
+Allow: /
+
+# Block bad bots (optional)
+User-agent: AhrefsBot
+Crawl-delay: 10
+
+User-agent: SemrushBot
+Crawl-delay: 10