Merged in fix/3697-prettier-configs (pull request #3396)

fix(SW-3691): Setup one prettier config for whole repo

* Setup prettierrc in root and remove other configs


Approved-by: Joakim Jäderberg
Approved-by: Linus Flood

packages/design-system/lib/components/BackToTopButton/backToTopButton.module.css

@@ -31,7 +31,7 @@
     /* This button is able to be on top of dark background colors, 
     so we need to create an illusion that it also has an inverted border on focus */
     &::before {
-      content: '';
+      content: "";
       position: absolute;
       inset: -4px;
       border: 2px solid var(--Border-Inverted);