* feat(toc): add Table of Contents scroll highlighting
- Introduced a new toc.css file for styling the Table of Contents with active link highlighting.
- Implemented toc-scroll.js to manage scroll behavior and link activation based on viewport visibility.
- Updated core.html to include the new JavaScript file and ensure proper loading of the Table of Contents functionality.
* chore: lower root heading font weight for TOC
* chore: run `task css`
* chore: update dependencies in package.json and package-lock.json to version 4.1.11 for @tailwindcss/postcss and tailwindcss, and update @jridgewell packages to latest versions
