Add complete bewerbung Next.js application

- Add all Next.js application files
- Include components, app structure, and public assets
- Remove empty bewerbung placeholder folder
- Update .gitignore for Next.js project

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

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

public/vercel.svg

@@ -0,0 +1 @@
+<svg fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1155 1000"><path d="m577.3 0 577.4 1000H0z" fill="#fff"/></svg>