add applications properties to Message Sent to Service bus (#4492)

Co-authored-by: Jérémie DEVILLARD <jdevillard@users.noreply.github.com>

src/modules/Elsa.AzureServiceBus/Activities/SendMessage.cs

@@ -52,6 +52,15 @@ public class SendMessage : CodeActivity
     /// The formatter to use when serializing the message body.
     /// </summary>
     public Input<Type?> FormatterType { get; set; } = default!;
+    /// <summary>
+    /// The application properties to embed with the Service Bus Message
+    /// </summary>
+    [Input(Category = "Advanced", 
+        DefaultSyntax = "Json", 
+        SupportedSyntaxes = new[] { "JavaScript", "Json" }, 
+        UIHint = InputUIHints.MultiLine)
+        ]
+    public Input<IDictionary<string, object>?> ApplicationProperties { get; set; } = default;
 
     /// <inheritdoc />
     protected override async ValueTask ExecuteAsync(ActivityExecutionContext context)
@@ -69,6 +78,9 @@ public class SendMessage : CodeActivity
 
             // TODO: Maybe expose additional members?
         };
+        if (context.Get(ApplicationProperties) != null)
+            foreach (var property in context.Get(ApplicationProperties))
+                message.ApplicationProperties.Add(property.Key, ((System.Text.Json.JsonElement)property.Value).GetString());
 
         var client = context.GetRequiredService<ServiceBusClient>();