Create GitHub Actions workflow for Copilot agent environment setup

[Copilot]

This PR adds a new GitHub Actions workflow file specifically designed to preconfigure the environment for GitHub Copilot agents. The workflow ensures consistency with existing CI/CD processes by reusing the same setup actions and configurations.

What's Added

The new workflow file .github/workflows/copilot-setup-steps.yml includes:

• Single job named copilot-setup-steps as specified in the requirements
• Flexible trigger options with both workflow_call (for reusability) and workflow_dispatch (for manual execution)
• Consistent environment setup that mirrors the existing build and test workflows

Setup Steps Integrated

The workflow integrates the following essential setup actions from the existing build-and-test.yml and deploy.yml workflows:

1. Code checkout using actions/checkout@v5
2. .NET environment setup using actions/setup-dotnet@v5 with .NET 8.x
3. NuGet package caching using actions/cache@v4 with the same cache key patterns
4. Dependency restoration using dotnet restore

Benefits for Copilot Agents

• Environment Consistency: Uses identical setup steps as production workflows
• Optimized Performance: Includes NuGet package caching to reduce setup time
• Reusability: Can be called from other workflows or triggered manually
• Minimal Footprint: Contains only the essential steps needed for environment preparation

This workflow provides GitHub Copilot agents with a reliable, consistent foundation for automated tasks while maintaining compatibility with the existing development and deployment processes.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• o3svsblobprodcus318.vsblob.vsassets.io
  • Triggering command: dotnet restore (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

This pull request was created as a result of the following prompt from Copilot chat.

Create a GitHub Actions workflow file at .github/workflows/copilot-setup-steps.yml to preconfigure the environment for GitHub Copilot agents. The workflow should include a single job named 'copilot-setup-steps'. Integrate setup and reusable actions from the existing build and test CI workflows to ensure consistency and proper environment configuration.

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.