fix: Spectre.CLI commands do not exit when pressing Ctrl + C

Author: philasmar

src/AWS.Deploy.CLI/CommandReturnCodes.cs

@@ -34,5 +34,9 @@ public class CommandReturnCodes
         /// using a TCP port that is already in use.
         /// </summary>
         public const int TCP_PORT_ERROR = -100;
+        /// <summary>
+        /// A command was canceled by a user.
+        /// </summary>
+        public const int USER_CANCEL = 130;
     }
 }

src/AWS.Deploy.CLI/Commands/CancellableAsyncCommand.cs

@@ -4,6 +4,7 @@
 using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
+using AWS.Deploy.CLI;
 
 namespace Spectre.Console.Cli;
 
@@ -36,6 +37,8 @@ void onSignal(PosixSignalContext context)
         {
             context.Cancel = true;
             cancellationSource.Cancel();
+
+            Environment.Exit(CommandReturnCodes.USER_CANCEL);
         }
     }
 }