Add news post type with list and detail routes

Elternbeirat.Web/Components/Pages/PostList.razor

@@ -0,0 +1,31 @@
+@page "/beitraege"
+@using System.Globalization
+@using Elternbeirat.Web.Services
+@inject PostService PostService
+
+<PageTitle>Beiträge</PageTitle>
+
+<h1>Beiträge</h1>
+
+@if (PostService.All.Count == 0)
+{
+    <p>Zurzeit gibt es keine Beiträge.</p>
+}
+else
+{
+    <ul class="post-list">
+        @foreach (var post in PostService.All)
+        {
+            <li>
+                <a href="@($"/beitraege/{post.Slug}")">@post.Title</a>
+                <time datetime="@post.Date.ToString("yyyy-MM-dd")">
+                    @post.Date.ToString("d. MMMM yyyy", _german)
+                </time>
+            </li>
+        }
+    </ul>
+}
+
+@code {
+    private static readonly CultureInfo _german = CultureInfo.GetCultureInfo("de-DE");
+}