Add Ratgeber section with new routes and links

- Introduced a new "Ratgeber" link in ImprintContainer.vue for better user navigation.
- Added multiple routes for the Ratgeber section, including GuideHubView, GuideFirstMessageView, GuideProfileView, GuideSafetyView, and GuideRedFlagsView, enhancing content accessibility.
- Implemented SEO metadata for the new routes to improve search engine visibility and user engagement.

These changes collectively enhance the site's informational resources and improve navigation for users seeking guidance on chat-related topics.

client/src/views/ChatView.vue

@@ -129,6 +129,7 @@
             <h1>Chat</h1>
           </div>
         </div>
+        <HeaderAdBanner />
       </header>
       <div class="horizontal-box horizontal-box-login">
         <div class="content login-content-shell">
@@ -154,6 +155,7 @@ import SearchView from '../components/SearchView.vue';
 import InboxView from '../components/InboxView.vue';
 import HistoryView from '../components/HistoryView.vue';
 import ImprintContainer from '../components/ImprintContainer.vue';
+import HeaderAdBanner from '../components/HeaderAdBanner.vue';
 
 const chatStore = useChatStore();