Restructure into feature folders with code-behind and scoped CSS

Elternbeirat.Web/Features/Posts/PostList.razor.cs

@@ -0,0 +1,8 @@
+using System.Globalization;
+
+namespace Elternbeirat.Web.Features.Posts;
+
+public partial class PostList
+{
+    private static readonly CultureInfo German = CultureInfo.GetCultureInfo("de-DE");
+}