Add local aspire script for OTel and Copilot Studio Client

[sw-joelmut]

Fixes # 678

Summary

Adds optional local Aspire orchestration for Node.js observability samples.

• Adds npm run aspire to the OTel agent sample.

  • Starts agent, Agents Playground, and Aspire Dashboard.
  • Supports anonymous and credentialed Playground flows.
  • Keeps Docker as the documented primary dashboard flow.

• Adds npm run aspire to the Copilot Studio React WebChat sample.

  • Starts WebChat through Aspire.
  • Adds browser OpenTelemetry document-load and fetch instrumentation.
  • Exports browser traces through local OTLP/HTTP.

• Adds AppHost configuration, generated-file ignores, dependencies, and TypeScript exclusions required by both samples.

Testing

The following images show the OTel and CopilotStudio Client samples working with aspire.

[sw-joelmut]

Feedback applied thanks