Extract date rendering into per-feature Date components

Elternbeirat.Web/Features/Posts/PostDetail.razor

@@ -12,10 +12,11 @@ else if (_post is not null)
         <a href="/posts">&larr; Alle Beiträge</a>
     </nav>
     <article>
-        <time class="post-meta" datetime="@_post.Date.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture)">
-            @_post.Date.ToString("d. MMMM yyyy", Cultures.German)
-        </time>
-        @Body
+        <div class="post-content">
+            <PostDate Value="_post.Date" />
+            <h2>@_post.Title</h2>
+            @Body
+        </div>
     </article>
 }
 @* No post and not unavailable: the slug was unknown; NavigationManager.NotFound()