Add option to ProxySettings to append guid to mapping file (#838)

* Add option to ProxySettings to append guid to mapping file

* .

* .

* .

examples/WireMockAzureQueueExample/Function1.cs

@@ -0,0 +1,13 @@
+using Microsoft.Azure.WebJobs;
+using Microsoft.Extensions.Logging;
+
+namespace WireMockAzureQueueExample;
+
+public class Function1
+{
+    [FunctionName("Function1")]
+    public void Run([QueueTrigger("myqueue-items", Connection = "ConnectionStringToWireMock")]string myQueueItem, ILogger log)
+    {
+        log.LogWarning($"C# Queue trigger function processed: {myQueueItem}");
+    }
+}