Refactor website to use shadcn components

frontend/constant/TechStack.ts

@@ -0,0 +1,49 @@
+export const techStack = {
+    row1: [
+        {
+            category: 'Programmiersprachen & Frameworks – Backend',
+            items: [
+                {id: 'java', label: 'Java'},
+                {id: 'dart', label: 'Dart'},
+                {id: 'kotlin', label: 'Kotlin'},
+                {id: 'spring', label: 'Spring'},
+            ],
+        },
+        {
+            category: 'Programmiersprachen & Frameworks – Frontend',
+            items: [
+                {id: 'html', label: 'HTML'},
+                {id: 'css', label: 'CSS'},
+                {id: 'bootstrap', label: 'Bootstrap'},
+                {id: 'nextjs', label: 'Next.js'},
+                {id: 'typescript', label: 'TypeScript'},
+                {id: 'flutter', label: 'Flutter'},
+            ],
+        },
+    ],
+    row2: [
+        {
+            category: 'Betriebssysteme',
+            items: [
+                {id: 'macos', label: 'macOS'},
+                {id: 'debian', label: 'Debian'},
+                {id: 'ubuntu', label: 'Ubuntu'},
+            ],
+        },
+        {
+            category: 'Version Control & Collaboration',
+            items: [
+                {id: 'gitlab', label: 'GitLab'},
+                {id: 'outline', label: 'Outline'},
+            ],
+        },
+        {
+            category: 'DevOps & Infrastruktur',
+            items: [
+                {id: 'gitlab-ci', label: 'GitLab CI'},
+                {id: 'docker', label: 'Docker'},
+                {id: 'proxmox', label: 'Proxmox'},
+            ],
+        },
+    ],
+};