refactor: Moved shared code into shared folder

Squashed commit of the following:

commit bdcc1abac9753790793e4f239d93050d4ec3f635
Author: Erik Tiekstra <erik.tiekstra@arbetsformedlingen.se>
Date:   Wed Jun 30 12:49:30 2021 +0200

    Moved shared code into shared folder

apps/dafa-web/src/app/shared/enums/toast-position.enum.ts

@@ -0,0 +1,11 @@
+export enum ToastPosition {
+  TOP_RIGHT = 'top-right',
+  TOP_CENTER = 'top-center',
+  TOP_LEFT = 'top-left',
+  BOTTOM_RIGHT = 'bottom-right',
+  BOTTOM_CENTER = 'bottom-center',
+  BOTTOM_LEFT = 'bottom-left',
+  CENTER_RIGHT = 'center-right',
+  CENTER_CENTER = 'center-center',
+  CENTER_LEFT = 'center-left',
+}