Docs for GRPC Error codes (#775)

Docs for GRPC Error codes in Case of Streaming.

README.md

@@ -550,7 +550,28 @@ server side.
 If writing your own gRPC clients in the language of choice consult
 gRPC guide on [cancellation](https://grpc.io/docs/guides/cancellation/#cancelling-an-rpc-call-on-the-client-side).
 
+### GRPC Status Codes
+
+Starting from release 24.08, Triton server introduces support for gRPC error
+codes in streaming mode for all clients enhancing error reporting capabilities. When
+this feature is enabled, the Triton server will return standard gRPC error codes
+and subsequently close the stream after delivering the error. This feature is
+optional can be enabled by adding header with `triton_grpc_error` key and `true` as
+value. See [grpc error
+codes](https://github.com/triton-inference-server/server/tree/main#GRPC-Status-Codes) in the server to learn about how this is handled on the server side. See gRPC
+guide on [status-codes](https://grpc.io/docs/guides/status-codes/) for more details.
+Below is a Python snippet to enable the feature. Without this header Triton server
+will continue streaming in default mode returning error message and status inside
+`InferenceServerException` object within the callback provided.
 
+```python
+  triton_client = grpcclient.InferenceServerClient(triton_server_url)
+  # New added header key value
+  metadata = {"triton_grpc_error": "true"}
+  triton_client.start_stream(
+    callback=partial(callback, user_data), headers=metadata
+  )
+```
 ## Simple Example Applications
 
 This section describes several of the simple example applications and