fix(admin-v2): Restore complete admin-v2 application

The admin-v2 application was incomplete in the repository. This commit
restores all missing components:

- Admin pages (76 pages): dashboard, ai, compliance, dsgvo, education,
  infrastructure, communication, development, onboarding, rbac
- SDK pages (45 pages): tom, dsfa, vvt, loeschfristen, einwilligungen,
  vendor-compliance, tom-generator, dsr, and more
- Developer portal (25 pages): API docs, SDK guides, frameworks
- All components, lib files, hooks, and types
- Updated package.json with all dependencies

The issue was caused by incomplete initial repository state - the full
admin-v2 codebase existed in backend/admin-v2 and docs-src/admin-v2
but was never fully synced to the main admin-v2 directory.

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

admin-v2/components/wizard/WizardStepper.tsx

@@ -0,0 +1,43 @@
+'use client'
+
+import type { WizardStep } from './types'
+
+interface WizardStepperProps {
+  steps: WizardStep[]
+  currentStep: number
+  onStepClick: (index: number) => void
+}
+
+export function WizardStepper({ steps, currentStep, onStepClick }: WizardStepperProps) {
+  return (
+    <div className="flex items-center justify-between mb-8 overflow-x-auto pb-4">
+      {steps.map((step, index) => (
+        <div key={step.id} className="flex items-center">
+          <button
+            onClick={() => onStepClick(index)}
+            className={`flex flex-col items-center min-w-[80px] p-2 rounded-lg transition-colors ${
+              index === currentStep
+                ? 'bg-blue-100 text-blue-700'
+                : step.status === 'completed'
+                ? 'bg-green-100 text-green-700 cursor-pointer hover:bg-green-200'
+                : step.status === 'failed'
+                ? 'bg-red-100 text-red-700 cursor-pointer hover:bg-red-200'
+                : 'text-gray-400'
+            }`}
+            disabled={index > currentStep && steps[index - 1]?.status === 'pending'}
+          >
+            <span className="text-2xl mb-1">{step.icon}</span>
+            <span className="text-xs font-medium text-center">{step.name}</span>
+            {step.status === 'completed' && <span className="text-xs text-green-600">✓</span>}
+            {step.status === 'failed' && <span className="text-xs text-red-600">✗</span>}
+          </button>
+          {index < steps.length - 1 && (
+            <div className={`h-0.5 w-8 mx-1 ${
+              index < currentStep ? 'bg-green-400' : 'bg-gray-200'
+            }`} />
+          )}
+        </div>
+      ))}
+    </div>
+  )
+}