Refactor Api-Client

Add Exceptionhandler, AlertService JSON-Converter
AppSettings via DI

Reformat Code

Jugenddienst Stunden/Platforms/Android/MainApplication.cs

@@ -1,7 +1,7 @@
 using Android.App;
 using Android.Runtime;
 
-namespace Jugenddienst_Stunden; 
+namespace Jugenddienst_Stunden;
 #if DEBUG
 [Application(UsesCleartextTraffic = true)]
 #else
@@ -13,4 +13,4 @@ public class MainApplication : MauiApplication {
 	}
 
 	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
-}
+}