Migrate from Vite to Next.js 15 with SSR

- Replace Vite + React Router with Next.js 15 App Router
- Implement i18n with next-intl (URL-based: /de, /en, /sr)
- Add SSR/SSG for all pages (48 static pages generated)
- Setup Supabase SSR client for auth
- Migrate all pages: Home, About, Portfolio, Blog, Contact, Login, Dashboard, Imprint, Privacy, Terms
- Add Docker support with standalone output
- Replace i18next with next-intl JSON translations
- Use next/image for optimized images

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

src/i18n/locales-old/de/pages/home/index.ts

@@ -0,0 +1,18 @@
+// src/i18n/locales/de/pages/home/index.ts
+import { hero } from './hero';
+import { about } from './about';
+import { experience } from './experience';
+import { expertise } from './expertise';
+import { skills } from './skills';
+import { projects } from './projects';
+
+export const home = {
+    hero,
+    about,
+    experience,
+    expertise,
+    skills,
+    projects
+} as const;
+
+export type HomeTranslations = typeof home;