feature: Added product variants feature #96

Job	Run time
test-stylelint	1m 35s
test-tsconfig	1m 31s
test-format	1m 28s
set-env	1s
test-lint	1m 51s
test-e2e-storefront	1m 11s
test-unit	5m 21s
test-storefront-visual-regression	3m 54s
test-build	6m 41s
test-visual-dev	0s
test-visual-pr	7m 39s
	31m 12s

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