fix(docs): harden generated markdown handling

[777genius]

Summary

• encode generated YAML scalar values with JSON-compatible YAML quoting
• replace the potentially super-linear Markdown link regex with a bounded scanner
• replace comment removal with a deterministic delimiter scan
• remove a no-op replacement and add focused Node regression tests

Evidence

• node --test website/tools/lib/frontmatter.test.mjs
• corepack pnpm@8.15.1 --dir website run docs:test
• git diff --check

Addresses CodeQL alerts #2, #3, #4, and #5.

[coderabbitai]

Warning

Review limit reached

Next included review available in 31 minutes.

Check out review usage here.

View limit details

Limit details: You’ve used the included review currently available.

You've used all free OSS reviews for now. Wait for the free limit to reset to keep reviewing this public repository.

Learn how review limits work.

Review configuration:

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Team

Run ID: d0244140-a37e-4e3c-ae5d-93f3280ca1c8

📥 Commits

Reviewing files that changed from the base of the PR and between aa9e03e and 842d4ea.

📒 Files selected for processing (4)

• website/package.json
• website/tools/extractors/node-runtime.mjs
• website/tools/lib/frontmatter.mjs
• website/tools/lib/frontmatter.test.mjs

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}