Learning Tooltip

[crutchcorn]

Preview: https://playfulprogramming-git-tooltip-oceanbit.vercel.app/posts/example#Snitip

TODO:

• Fix tooltip not appearing when hovered from top
• Fix focus of elements inside snitip content (works when activated by keyboard, but not for hover)
• Fix scroll position when the snitip is focused by URL
• Test images/icons
• Implement global/tagged snitips
• Add info icon/focus/popup styling for inline snitip links
• Implement snitip modal/dialog on mobile breakpoint
• Fix focus jump when navigating away from the popup on Firefox

Closes #1160