.Net: Demo/process-framework-signalr

[tommasodotNET]

Motivation and Context

This demo shows how to implement human-in-the-loop in Process Framework with SignalR. It is based on the ProcessWithCloudEvents one, readapting it to use SignalR.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[tommasodotNET]

Adding reference to issue #10959 as this PR addresses that

[markwallace-microsoft]

@tommasodotNET can you fix the merge conflict and we can get this merged

[tommasodotNET]

@tommasodotNET can you fix the merge conflict and we can get this merged

done 😃

[markwallace-microsoft]

Merge failed due to unrelated integration test:

SemanticKernel.IntegrationTests.Connectors.OpenAI.OpenAIChatCompletionNonStreamingTests.TextGenerationShouldReturnMetadataAsync [FAIL]
[xUnit.net 00:04:04.13]       Microsoft.SemanticKernel.HttpOperationException : Service request failed.
[xUnit.net 00:04:04.13]       Status: 503 (Service Unavailable)
[xUnit.net 00:04:04.13]       
[xUnit.net 00:04:04.13]       ---- System.ClientModel.ClientResultException : Service request failed.
[xUnit.net 00:04:04.13]       Status: 503 (Service Unavailable)

[markwallace-microsoft]

Another unrelated integration test failure

Failed SemanticKernel.IntegrationTests.Connectors.OpenAI.OpenAIChatCompletionFunctionCallingTests.ConnectorAgnosticFunctionCallingModelClassesSupportSimulatedFunctionCallsAsync [31 s]
  Error Message:
   Polly.Timeout.TimeoutRejectedException : The operation didn't complete within the allowed timeout of '00:00:30'.
---- System.Threading.Tasks.TaskCanceledException : The operation was canceled.
-------- System.IO.IOException : Unable to read data from the transport connection: Operation canceled.
------------ System.Net.Sockets.SocketException : Operation canceled
  Stack Trace:
     at Polly.Utils.ExceptionUtilities.TrySetStackTrace[T](T exception)
   at Polly.Timeout.TimeoutResilienceStrategy.ExecuteCore[TResult,TState](Func`3 callback, ResilienceContext context, TState state)