Merged in feat/sw-2873-move-backtotopbutton-to-design-system (pull request #2593)

feat(SW-2873): Move BackToTopButton to design-system

* Remove dependency on i18n in BackToTopButton

* Move BackToTopButton to design-system


Approved-by: Hrishikesh Vaipurkar

packages/design-system/lib/components/BackToTopButton/variants.ts

@@ -0,0 +1,16 @@
+import { cva } from 'class-variance-authority'
+
+import styles from './backToTopButton.module.css'
+
+export const backToTopButtonVariants = cva(styles.backToTopButton, {
+  variants: {
+    position: {
+      left: styles.left,
+      right: styles.right,
+      center: styles.center,
+    },
+  },
+  defaultVariants: {
+    position: 'right',
+  },
+})