New Test Run Hub in Azure Test Plans

Introduces the new Test Run Hub in Azure Test Plans, providing real-time visibility into test progress and quality trends, comprehensive analytics for auditing and improving testing strategies, and seamless end-to-end user flows for test run creation and management. Enhancements include filtering by pipeline execution, user-specific filter saving, filtering by area path, expanded attachment preview and deletion, and markdown support for comments. Programmatic management via the Azure DevOps REST API is also highlighted.