feat: add Node.js Agentic Issue Resolver sample

[Impesud]

📝 Summary

• This PR adds a new sample project: Node.js Agentic Issue Resolver. It demonstrates how to build an autonomous developer agent that leverages the GitHub Copilot SDK to explore a local codebase and resolve tasks (issues) by interacting with the filesystem.

✨ Key Features

• Autonomous Workflow: The agent uses a combination of glob, grep, and view tools to understand the project structure before making changes.
• Resilient Tool Strategy: One of the main challenges in the current Technical Preview is the sensitivity of the edit tool. This sample demonstrates a best practice by guiding the agent to use write_file for full-file updates, significantly reducing 400 Bad Request errors.
• Enhanced Observability: Implements real-time event listeners for tool.execution_start and tool.execution_complete, providing a transparent CLI feedback loop for the user.
• Modern ESM Implementation: Built with TypeScript and tsx, ensuring compatibility with Node.js v18 up to v24.13.0 (tested on WSL/Ubuntu).

🛠 Technical Decisions

• Extended Timeout: Set a 300,000ms (5 minutes) timeout to accommodate complex reasoning tasks that require multiple tool calls.

✅ How to Test

• Navigate to samples/nodejs-issue-resolver.
• Run npm install.
• Execute: npm start "Update the description in package.json to 'AI Agent' and bump version".
• Observe the granular logs for each tool execution and verify the file change.

[friggeri]

We're going to move the samples into the Awesome Copilot repo, I recommend putting this up in a repo of your own and opening a PR there to link to it. Thanks for your contribution!