Extract date rendering into per-feature Date components

Elternbeirat.Web/Features/Embeds/PostsEmbed.razor

@@ -1,3 +1,4 @@
+@using Elternbeirat.Web.Features.Posts
 @if (_latest.Count > 0)
 {
     <section class="embed embed-posts">
@@ -7,9 +8,7 @@
             {
                 <li>
                     <a href="@($"/posts/{post.Slug}")">@post.Title</a>
-                    <time datetime="@post.Date.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture)">
-                        @post.Date.ToString("d. MMMM yyyy", Cultures.German)
-                    </time>
+                    <PostDate Value="post.Date" />
                 </li>
             }
         </ul>