ci: use pnpm/setup and devEngines

[danielroe]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

this uses the new https://github.com/pnpm/setup github action to replace actions/setup-node + corepack, as corepack is going away in node 26+ 😢

[github-actions]

Mixed activity

Activity patterns show a mix of organic and automated signals.

View full analysis →

Evidence

• Very high PR volume (daily): 43 PRs within a single 24-hour window

Last 5 PRs:

• https://redirect.github.com/nuxt/nuxt/pull/36325
• https://redirect.github.com/danielroe/cross-origin-storage/pull/58
• https://redirect.github.com/danielroe/fnv1a-64/pull/7
• https://redirect.github.com/danielroe/clickable-path/pull/32
• https://redirect.github.com/danielroe/my-bad/pull/16

_{This is an automated analysis by AgentScan}

[github-actions]

We've flagged this as a potential contribution without a human behind it. We welcome the thoughtful use of AI tools when contributing, but ask all contributors to follow two core principles:

1. Never let an LLM speak for you - all comments, issues, and PR descriptions should be written in your own words, reflecting your own understanding.
2. Never let an LLM think for you - only submit contributions you fully understand and can explain.

Please review these AI-assisted contribution guidelines and update this contribution if needed.

If this was flagged in error, we apologise! 😳 Just let us know. 🙏