chore: import upstream snapshot with attribution

dotnet/samples/GettingStartedWithProcesses/Step02/Steps/MailServiceStep.cs

@@ -0,0 +1,27 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using Microsoft.SemanticKernel;
+using Step02.Models;
+
+namespace Step02.Steps;
+
+/// <summary>
+/// Mock step that emulates Mail Service with a message for the user.
+/// </summary>
+public class MailServiceStep : KernelProcessStep
+{
+    public static class ProcessStepFunctions
+    {
+        public const string SendMailToUserWithDetails = nameof(SendMailToUserWithDetails);
+    }
+
+    [KernelFunction(ProcessStepFunctions.SendMailToUserWithDetails)]
+    public async Task SendMailServiceAsync(KernelProcessStepContext context, string message)
+    {
+        Console.WriteLine("======== MAIL SERVICE ======== ");
+        Console.WriteLine(message);
+        Console.WriteLine("============================== ");
+
+        await context.EmitEventAsync(new() { Id = AccountOpeningEvents.MailServiceSent, Data = message });
+    }
+}