Update MassTransitBroker to use Memory

The code previously had the MassTransitBroker set to AzureServiceBus. This commit changes it to use in-memory MassTransitBroker. An "Memory" enumeration value is also added in the MassTransitBroker enumeration.

src/bundles/Elsa.Server.Web/Enums/MassTransitBroker.cs

@@ -5,6 +5,7 @@ namespace Elsa.Server.Web;
 /// </summary>
 public enum MassTransitBroker
 {
+    Memory,
     AzureServiceBus,
     RabbitMq
 }

src/bundles/Elsa.Server.Web/Program.cs

@@ -30,7 +30,7 @@ const bool useHangfire = false;
 const bool useQuartz = true;
 const bool useMassTransit = true;
 const bool useZipCompression = true;
-const MassTransitBroker useMassTransitBroker = MassTransitBroker.AzureServiceBus;
+const MassTransitBroker useMassTransitBroker = MassTransitBroker.Memory;
 
 var builder = WebApplication.CreateBuilder(args);
 var services = builder.Services;