.Net: Inject Semantic Kernel Headers for Ollama HttpClients

[rogerbarreto]

Allow adding telemetry (headers) information to requests performed using Ollama Connector when providing httpClient or OllamaClient to Service constructors.

• Allow custom http request headers awaescher/OllamaSharp#79

[github-actions]

This issue is stale because it has been open for 90 days with no activity.

[github-actions]

This issue was closed because it has been inactive for 14 days since being marked as stale.