feat: Add professional portfolio images and Hero redesign

- Add 15 optimized WebP images for portfolio (21-53KB each)
- Redesign Hero section with full-width background image
- Add SSR support for Hero component
- Update About section with new portrait image
- Update Contact page with professional headshot
- Add images to Services/Leistungen page
- Add image optimization script (sharp)
- Update translations for gallery section

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/seo/index.ts

@@ -0,0 +1,15 @@
+export {
+  PersonJsonLd,
+  ProfessionalServiceJsonLd,
+  BreadcrumbJsonLd,
+  WebPageJsonLd,
+  FAQJsonLd,
+  ServiceJsonLd,
+  OrganizationJsonLd,
+  ArticleJsonLd,
+  WebSiteJsonLd,
+  HowToJsonLd,
+  ProfilePageJsonLd,
+  VideoJsonLd,
+  SoftwareAppJsonLd,
+} from './JsonLd';