refactor(SplashViz): migrate from SCSS to Tailwind CSS #7093

Job	Run time
E2E test and link check (ubuntu-latest, lts/*)	7m 7s
Proselint (ubuntu-latest, lts/*)	40s
Unit Test (ubuntu-latest, lts/*)	38s
Lint (ubuntu-latest, lts/*)	1m 12s
	9m 37s

Provide feedback