Add usage telemetry for aieval dotnet tool

[shyamnamboodiripad]

See TELEMETRY.md included in this PR for details.

Microsoft Reviewers: Open in CodeFlow

[Copilot]

Pull Request Overview

This PR adds telemetry collection functionality to the aieval .NET tool to help understand usage patterns and improve the user experience. The telemetry is anonymous and only collected when using the command-line tool, not when using the evaluation libraries in code.

• Adds comprehensive telemetry infrastructure with opt-out capability
• Renames and refactors utilities for better consistency across the codebase
• Includes detailed documentation explaining what data is collected and privacy commitments

Reviewed Changes

Copilot reviewed 40 out of 40 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/Libraries/Microsoft.Extensions.AI.Evaluation.Console/Telemetry/TelemetryHelper.cs	Core telemetry collection class with Application Insights integration
src/Libraries/Microsoft.Extensions.AI.Evaluation.Console/Telemetry/TelemetryConstants.cs	Constants and configuration for telemetry collection including opt-out logic
src/Libraries/Microsoft.Extensions.AI.Evaluation.Console/TELEMETRY.md	Documentation explaining telemetry collection, privacy, and opt-out procedures
src/Libraries/Microsoft.Extensions.AI.Evaluation.Console/Program.cs	Updated main program to initialize telemetry and display first-run messages
src/Libraries/Microsoft.Extensions.AI.Evaluation.Console/Commands/*.cs	Updated command classes to integrate telemetry reporting
src/Libraries/Microsoft.Extensions.AI.Evaluation/Utilities/BuiltInMetricUtilities.cs	Renamed from BuiltInEvaluatorUtilities and added new metadata constants
Various test and project files	Updated references and cleaned up pragma warnings for consistency