Implement batch disposition

Signed-off-by: Gabriele Santomaggio <[email protected]>

Author: Gsantomaggio

Tests/Consumer/ConsumerDispositionTests.cs

@@ -205,7 +205,7 @@ public async Task BatchRequeueAnnotationsDisposition()
                         { annotationKey, annotationValue }, { annotationKey1, annotationValue1 }
                     });
                     Assert.Equal(0, batch.Count());
-                    
+
                     tcs.SetResult(true);
 
                     return Task.CompletedTask;