RAC + Spectrum + Tailwind example (#4819)
* initialize example
* add to verdaccio
* typo
* temporarily enable build comment
* temp remove main filter
* add readme
* update config
* add more examples
* improve default focus ring
* simplify examples
* split out into preset
* add font weights
* add letterSpacing and lineHeight
* add transition timings and durations
* improve sentiment example
* improve select box example
* improve select box example
* improve examples
* add sizes
* fix size values
* fix transition values
* update break points
* improve examples
* add dropShadow to preset
* add Theme switcher
* dark mode fixes
* clean up
* fix spacing/sizing
* spacing
* cleanup
* add default blue
* add opacity
* fix theme switcher margin
* add rac plugin
* update sentiment example to style w/ attributes
* add plugin to config
* cleanup attributes in plugin
* cleanup plugin
* add more color variants
* formatting
* update README
* cleanup
* use custom selector for dark mode
* revert CI changes
* cleanup
