Add copilot-setup-steps.yml workflow for GitHub Copilot coding agent

[Copilot]

• Explore repository structure and understand project type (Unity SDK package)
• Research copilot-setup-steps.yml format and requirements
• Create .github/workflows/copilot-setup-steps.yml file
• Configure workflow with appropriate Unity/C# tooling
• Validate YAML syntax
• Run security scan with CodeQL (no issues found)
• Verify workflow commands execute correctly
• Address PR feedback: Add documentation about .NET SDK limitations for Unity APIs
• Review and finalize implementation

Summary

Successfully created .github/workflows/copilot-setup-steps.yml to enhance GitHub Copilot's capabilities in this repository. The workflow:

• Uses the required copilot-setup-steps job name
• Checks out repository code
• Sets up .NET SDK 6.0.x for basic C# syntax support (with documented limitations for Unity-specific APIs)
• Uses jq for robust JSON parsing
• Displays Unity package information for verification
• Follows security best practices with minimal permissions
• Triggers on manual dispatch and file changes for easy testing

Recent Changes (Commit f8ffea8+)

• Added inline documentation explaining that .NET SDK provides basic C# syntax support, but has limitations with Unity-specific APIs (UnityEngine, UnityEditor)
• Clarified that the setup still helps with general C# patterns and non-Unity code analysis

Original prompt

Enhance GitHub Copilot's capabilities in this repo with a properly configured copilot-setup-steps.yml file in the .github/workflows directory.

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[Copilot]

Pull Request Overview

This PR adds a GitHub Actions workflow to configure the development environment for GitHub Copilot's coding agent, providing context about the Mixpanel Unity SDK to enhance Copilot's code assistance capabilities.

Key Changes

• Adds .github/workflows/copilot-setup-steps.yml with environment setup for Copilot
• Configures .NET SDK 6.0.x for C# language tooling support
• Implements workflow triggers for manual dispatch and automatic validation on workflow changes

[Copilot]

[nitpick] Setting up .NET SDK 6.0.x may not provide optimal IntelliSense for this Unity SDK, as the code uses Unity-specific APIs (UnityEngine, UnityEditor) that aren't available in the standard .NET SDK.

For a Unity project, consider either:

1. Documenting in comments that this SDK is for basic C# syntax support only
2. Removing the .NET setup step if Unity-specific context isn't needed
3. Investigating if Unity Editor or Unity tooling can be set up in CI for better accuracy

The current setup may give Copilot incomplete or misleading type information for Unity-specific code.

[jaredmixpanel]

@copilot apply changes based on this feedback

[Copilot]

Added documentation in commit ae61b49 explaining that the .NET SDK provides basic C# syntax support, with a clear note about limitations for Unity-specific APIs (UnityEngine, UnityEditor). The setup still helps Copilot with general C# patterns and non-Unity code analysis.