ConfigurationBinder static class -> extension

Author: lilla28

src/fdc3/dotnet/DesktopAgent/src/DesktopAgent/DependencyInjection/ServiceCollectionExtensions.cs

@@ -49,7 +49,7 @@ public static IServiceCollection InjectFdc3BackendServiceIfEnabledFromConfig(
         IConfiguration configuration,
         Action<Fdc3DesktopAgentBuilder>? builderAction = null)
     {
-        var fdc3Options = ConfigurationBinder.Get<Fdc3Options>(configuration);
+        var fdc3Options = configuration.Get<Fdc3Options>();
 
         //TODO: This should be feature toggle, once we have feature toggles in the future - instead of having `EnableFdc3` inside Fdc3Options.
         if (fdc3Options.EnableFdc3)

src/shell/dotnet/Shell/App.xaml.cs

@@ -113,9 +113,8 @@ private void ConfigureServices(HostBuilderContext context, IServiceCollection se
                 .UseAccessToken(_messageRouterAccessToken));
 
         //This can be replaced by the `InjectFdc3BackendServiceIfEnabledFromConfig` extension method
-        ///* services.InjectFdc3BackendServiceIfEnabledFromConfig(fdc3ConfigurationSection);
-        var fdc3ConfigurationSection = context.Configuration.GetSection(Fdc3Options.Fdc3OptionsName);
-        var fdc3Options = ConfigurationBinder.Get<Fdc3Options>(fdc3ConfigurationSection);
+        ///* services.InjectFdc3BackendServiceIfEnabledFromConfig(context.Configuration.GetSection(Fdc3Options.Fdc3OptionsName));
+        var fdc3Options = context.Configuration.GetSection(Fdc3Options.Fdc3OptionsName).Get<Fdc3Options>();
 
         //TODO: This should be feature toggle, once we have feature toggles - instead of having `EnableFdc3` inside Fdc3Options.
         if (fdc3Options != null && fdc3Options.EnableFdc3)