ci: exclude spec files from copilot review

[tadjik1]

Description

Summary of Changes

Provide custom instruction for Copilot to ignore spec files.
As per official documentation: https://docs.github.com/en/copilot/how-tos/configure-custom-instructions/add-repository-instructions#creating-path-specific-custom-instructions

Notes for Reviewers

What is the motivation for this change?

Release Highlight

Release notes highlight

Double check the following

• Lint is passing (npm run check:lint)
• Self-review completed using the steps outlined here
• PR title follows the correct format: type(NODE-xxxx)[!]: description
  • Example: feat(NODE-1234)!: rewriting everything in coffeescript
• Changes are covered by tests
• New TODOs have a related JIRA ticket

[Copilot]

Pull request overview

Adds repository-level, path-specific GitHub Copilot instructions to avoid suggesting changes to upstream-copied spec test files under test/spec/.

Changes:

• Introduces a new .github/instructions/*.instructions.md file with applyTo targeting test/spec/**.
• Instructs Copilot to not suggest modifications to those spec test files to preserve upstream parity.

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💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

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:

• fake
  • Triggering command: /opt/hostedtoolcache/node/24.14.1/x64/bin/node /opt/hostedtoolcache/node/24.14.1/x64/bin/node --no-experimental-strip-types /home/REDACTED/work/node-mongodb-native/node-mongodb-native/node_modules/mocha/lib/cli/cli.js test/unit --no-config --no-package --require source-map-support/register --require ts-node/register --require test/tools/REDACTED/throw_rejections.cjs --require test/tools/REDACTED/chai_addons.ts --require test/tools/REDACTED/ee_checker.ts --extension js --extension ts (dns block)
• localhost.a.com
  • Triggering command: /opt/hostedtoolcache/node/24.14.1/x64/bin/node /opt/hostedtoolcache/node/24.14.1/x64/bin/node --no-experimental-strip-types /home/REDACTED/work/node-mongodb-native/node-mongodb-native/node_modules/mocha/lib/cli/cli.js test/unit --no-config --no-package --require source-map-support/register --require ts-node/register --require test/tools/REDACTED/throw_rejections.cjs --require test/tools/REDACTED/chai_addons.ts --require test/tools/REDACTED/ee_checker.ts --extension js --extension ts (dns block)
• non-existent
  • Triggering command: /opt/hostedtoolcache/node/24.14.1/x64/bin/node /opt/hostedtoolcache/node/24.14.1/x64/bin/node --no-experimental-strip-types /home/REDACTED/work/node-mongodb-native/node-mongodb-native/node_modules/mocha/lib/cli/cli.js test/unit --no-config --no-package --require source-map-support/register --require ts-node/register --require test/tools/REDACTED/throw_rejections.cjs --require test/tools/REDACTED/chai_addons.ts --require test/tools/REDACTED/ee_checker.ts --extension js --extension ts (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)