🔗 Add **KI-Assistent** guide for integrating EINUNDZWANZIG with Claude.ai

- 🌐 Added translations (de, en, es, lv, nl, pt) and localized content for setup guide.
- 🧭 Introduced `/ki-assistent` route with detailed instructions and screenshots.
- 🎉 Updated sidebar navigation to include KI-Assistent link.
- ✏️ Configured SEO metadata for KI-Assistent page.
- 🧪 Added feature tests for guide accessibility and key content.

resources/views/components/layouts/app/sidebar.blade.php

@@ -127,6 +127,12 @@
     <flux:spacer/>
 
     <flux:navlist variant="outline">
+        <flux:navlist.item icon="sparkles"
+                           :href="route('ki-assistent')"
+                           :current="request()->routeIs('ki-assistent')"
+                           wire:navigate>
+            {{ __('KI-Assistent') }}
+        </flux:navlist.item>
         <flux:navlist.item icon="book-open-text"
                            :href="route('scramble.docs.ui')"
                            target="_blank">