cleanup: Remove duplicate cookie-banner route, redirect to /sdk/cookie-banner

- Deleted 6 unused components from /sdk/einwilligungen/cookie-banner/_components/
- Replaced page.tsx with Next.js redirect() to /sdk/cookie-banner
- Updated EinwilligungenNavTabs link to /sdk/cookie-banner
- Updated catalog page link to /sdk/cookie-banner
- Single source of truth: /sdk/cookie-banner (Step in "Rechtliche Texte")

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

admin-compliance/app/sdk/einwilligungen/cookie-banner/page.tsx

@@ -1,18 +1,5 @@
-'use client'
+import { redirect } from 'next/navigation'
 
-/**
- * Cookie Banner Configuration Page
- *
- * Konfiguriert den Cookie-Banner basierend auf dem Datenpunktkatalog.
- */
-
-import { EinwilligungenProvider } from '@/lib/sdk/einwilligungen/context'
-import { CookieBannerContent } from './_components/CookieBannerContent'
-
-export default function CookieBannerPage() {
-  return (
-    <EinwilligungenProvider>
-      <CookieBannerContent />
-    </EinwilligungenProvider>
-  )
+export default function CookieBannerRedirect() {
+  redirect('/sdk/cookie-banner')
 }