Add Node.js CLI application structure

[Copilot]

Sets up a buildable CLI application scaffold for the GitHub Copilot CLI distribution repository.

Changes

• package.json - npm package config with @github/copilot name, bin entry point, build/test scripts
• src/index.js - CLI entry point with argument parsing for --help, --version, --banner, --experimental
• test/cli.test.js - Unit tests using Node.js built-in test runner
• .gitignore - Standard exclusions for node_modules, build artifacts, IDE files

Usage

npm run build        # Build CLI
npm test             # Run tests (7 passing)
node src/index.js    # Run CLI

copilot --help       # Show usage
copilot --version    # Show version
copilot --banner     # Display banner

Original prompt

https://github.com/CarlSp8/copilot-cli.git build

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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.