Integrate Aspire Dashboard with Azure Functions CLI

Improve the local development experience by integrating the standalone .NET Aspire Dashboard with Azure Functions Core Tools, enabling developers to observe traces, metrics, and logs locally without a full .NET Aspire AppHost.

Currently, there is no out-of-the-box local observability story for Azure Functions during local development. Developers have limited visibility into request traces, dependencies, and metrics when running func start. The Aspire Dashboard provides a rich OpenTelemetry UI that can fill this gap.