docs: add `Snackbar` documentation #7478

Job	Run time
Tests / A11y Tests	4m 21s
Artifacts / Build	4m 40s
Tests / Static Checks	2m 33s
Tests / Build	59s
Tests / Playwright Tests (chrome)	3m 54s
Tests / Unit Tests	3m 0s
Tests / Playwright Tests (firefox)	3m 16s
Visual Tests / Chromatic	2m 6s
Artifacts / Deploy	43s
	25m 32s

Provide feedback