fix: Changed to use .GetExportedTypes instead of .GetTypes.

This is a workaround for an issue in System.Data which throws a "Could not load type 'SqlGuidCaster' from assembly 'System.Data.SqlClient, Version=4.6.1.5, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' because it contains an object field at offset 0 that is incorrectly aligned or overlapped by a non-object field.

Reference: dotnet/SqlClient#1930

Nucleus.Web/Controllers/Setup/SiteWizardController.cs

@@ -930,7 +930,7 @@ private static Type[] GetTypes(System.Reflection.Assembly assembly)
   {
     try
     {
-      return assembly.GetTypes();
+      return assembly.GetExportedTypes();
     }
     catch (System.Reflection.ReflectionTypeLoadException)
     {