https://olets.dev/posts/numbered-code-block-lines-in-eleventy-with-shiki-twoslash/
Numbered Code Block Lines in Eleventy with Shiki Twoslash | olets.dev
Bringing in a third-party library for easy, reliable line numbering
code block linesnumberedshiki
https://olets.dev/posts/highlight-code-block-lines-in-eleventy-with-shiki-twoslash/
Highlight Code Block Lines In Eleventy with Shiki Twoslash | olets.dev
Eleventy Markdown code block line highlighting made simple
code block lineshighlight