SEO & content optimization: meta tags, structured data, improved targeting

Major improvements:
- Add comprehensive meta tags (Open Graph, Twitter Cards, canonical URL)
- Implement schema.org structured data (Organization, FAQPage)
- Optimize H1 with keywords: "Non-profit registrator for .dk-domæner"
- Add robots.txt and sitemap.xml with Flask routes
- Improve hero intro with specific pain point (90-150 kr/year)
- Enhance DNSSEC description with technical details (DS-records)
- Update timeline to May 2026
- Add FAQ comparing PunktFri to commercial providers
- CSS styling for H1 subtitle

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

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

static/robots.txt

@@ -0,0 +1,10 @@
+# robots.txt for punktfri.dk
+
+User-agent: *
+Allow: /
+
+# Sitemap
+Sitemap: https://punktfri.dk/sitemap.xml
+
+# Disallow admin area
+Disallow: /admin