chore: add GitHub Copilot instructions for repository (#709)

[Copilot]

Adds .github/copilot-instructions.md to guide GitHub Copilot coding agent when working with this repository.

Contents

• Repository context: TypeScript library package structure, compilation to lib/, peer dependency model
• Code standards: Strict TypeScript, explicit return types, JSDoc requirements, alphabetical key sorting
• Development workflow: Build/test/lint commands, pre-commit hooks, testing patterns (Jest + React Testing Library in /tests)
• Common pitfalls: Don't import from lib/, maintain peer dependencies, preserve backward compatibility
• Local setup: Development workflow with Data Browser via npm link

Example of documented JSDoc standard:

/**
 * Transforms a route by removing inactivity parameters.
 * @param routes - Array of route strings to transform.
 * @returns The first non-login route without inactivity param, or undefined.
 */
function transformRoute(routes: string[]): string | undefined {
  // implementation
}

Follows best practices from https://gh.io/copilot-coding-agent-tips for repository custom instructions.

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:

• gh.io
  • Triggering command: /usr/bin/curl curl -s REDACTED (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)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>✨ Set up Copilot instructions</issue_title>
<issue_description>Configure instructions for this repository as documented in Best practices for Copilot coding agent in your repository.

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes ✨ Set up Copilot instructions #709

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[NoopDog]

@copilot make sure the changes are formatted with the same version of prettier the proeject uses in its run checks

[Copilot]

@copilot make sure the changes are formatted with the same version of prettier the proeject uses in its run checks

The copilot-instructions.md file is already formatted with the project's prettier version (^2.8.3). The formatting was applied in commit d374ff6, which removed trailing whitespace as expected. Running npm run check-format confirms all files pass the formatting check.

[frano-m]

Niiiice @NoopDog