chore(widget): disable avatar rounding by default

Merge branch 'jitwxs-work'

fix(css): transform-scale elements are mistaken for the container for…

… fixed elements

feat(widget): show floating toc on mobile devices

chore(animejs): better loading visuals

fix(readme): image size and link fixes

fix(comment): disable gitment on index page

feat: add support for inline images

feat: replace fancybox with lightgallery

chore: update readme