feat(react): add `Skeleton` & `InputAdornment` components #387

Job	Run time
💅 Storybook (lts/*)	7m 10s
🌳 ESLint (STATIC ANALYSIS) (lts/*)	4m 34s
ʦ Typecheck (STATIC ANALYSIS) (lts/*)	5m 31s
👾 Unit Tests (lts/*)	8m 51s
🚧 Build (lts/*)	3m 56s
	30m 2s

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