Add PocketBase client with contracts and sharp build tooling

Elternbeirat.Web/Features/Events/Event.cs

@@ -1,4 +1,4 @@
-namespace Elternbeirat.Web.Services;
+namespace Elternbeirat.Web.Features.Events;
 
 /// <summary>
 /// A single calendar entry (parents' evening, meeting, deadline). Read from