feat(ci): add codeowners

[avivkeller]

Fixes #9. This is my best guess on who should own each file, but cc @nodejs/TSC to double check.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
nodejs-learn	Ready	Preview	Apr 25, 2026 9:20pm

[cursor]

PR Summary

Medium Risk
Adds a new pull_request_target GitHub Action with pull-requests: write permissions to post review-request comments, which is moderately sensitive if misconfigured. Otherwise changes are limited to review routing/automation and do not affect runtime code.

Overview
Adds a new .github/CODEOWNERS file to route reviews to specific Node.js working groups based on documentation path patterns, with repo-wide defaults and a catch-all for infra files.

Adds a Request Codeowner Reviews GitHub workflow that runs on PR open (pull_request_target) and uses pkgjs/request-codeowner-review to automatically request the relevant CODEOWNERS and leave the result as a PR comment.

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[Copilot]

Pull request overview

Adds repository ownership metadata and an automation workflow to request CODEOWNERS-based reviews on newly opened pull requests (Fixes #9).

Changes:

• Introduces a CODEOWNERS file under .github/ mapping content areas to Node.js teams.
• Adds a GitHub Actions workflow to request codeowner reviews on pull_request_target (opened) events.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
.github/workflows/request-codeowner-review.yml	New workflow to request CODEOWNERS-based reviews for newly opened PRs.
.github/CODEOWNERS	New CODEOWNERS rules assigning ownership for pages and dotfiles.

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