Refactor Api-Client

Add Exceptionhandler, AlertService JSON-Converter
AppSettings via DI

Reformat Code

Jugenddienst Stunden/Types/Sollstunden.cs

@@ -1,7 +1,7 @@
 namespace Jugenddienst_Stunden.Types;
 
 public class Sollstunden {
-    public int Timetable { get; set; }
-    public int Wochentag { get; set; }
-    public double Zeit { get; set; }
-}
+	public int Timetable { get; set; }
+	public int Wochentag { get; set; }
+	public double Zeit { get; set; }
+}