chore(deps): require pi 0.83 runtime

[madgegja]

Summary

• require pi 0.83 peers and Node 22.19+
• update CI to Node 22/24
• refresh the lock while preserving jsdom, undici, readability, and turndown versions

Verification

• npm run check
• npm test (40)
• npm ls --all
• npm pack --dry-run
• direct production audit: 0 vulnerabilities

[madgegja]

All local gates pass. Please approve https://github.com/code-yeongyu/pi-webfetch/actions/runs/30711016262. The main-protection ruleset still requires Node 20/22 contexts while this PR intentionally emits Node 22/24; please update ruleset 15822204, then merge with a merge commit after CI is green.