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/app/layout.tsx

@@ -3,8 +3,8 @@ import './globals.css';
 
 export const metadata: Metadata = {
   title: {
-    template: '%s | Damjan Savic',
-    default: 'Damjan Savic | AI & Automation Specialist',
+    template: '%s | Damjan Savić',
+    default: 'Damjan Savić | AI & Automation Specialist',
   },
   description: 'AI & Automation Specialist - Building AI agents and automation solutions.',
   metadataBase: new URL(process.env.NEXT_PUBLIC_SITE_URL || 'https://damjan-savic.com'),