Send Success notification when Command is executed

extract Action of the Commands
simplify somme classes

src/main/kotlin/eventDemo/app/notification/CommandSuccessNotification.kt

@@ -0,0 +1,14 @@
+package eventDemo.app.notification
+
+import eventDemo.configuration.UUIDSerializer
+import eventDemo.libs.command.CommandId
+import kotlinx.serialization.Serializable
+import java.util.UUID
+
+@Serializable
+data class CommandSuccessNotification(
+  @Serializable(with = UUIDSerializer::class)
+  override val id: UUID = UUID.randomUUID(),
+  val commandId: CommandId,
+) : Notification,
+  CommandNotification