.Net: Add Examples to retrieve FinishReason/DoneReason and other details with the Ollama connector

[akordowski]

Motivation and Context

As other connectors are providing a FinishReason = "STOP" metadata in the last StreamingChatMessageContent message, I adjusted the GetStreamingChatMessageContentsAsync() method in the OllamaChatCompletionService to provide the expected metadata.

Description

The ChatResponseStream message from the OllamaSharp package provides a Done property, which indicates if the stream is finished. This property is used to determine when to set the metadata with FinishReason = "STOP".

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 😄

[RogerBarreto]

@akordowski Thank you for the contribution, I'm changing this PR to clarify how you can retrieve the desired information using the Breaking Glass inner content property.

[akordowski]

@RogerBarreto Sounds good, thank you very much!