Frontend: Snackbar component

[Tim Friedrich Brüggemann]

We should use a standalone component for all messages that should be shown via snackbars, and recursively emit the given message if needed.

[Dennis Schuster]

any updates on this? @florian262000 @TibiIius @Tomyk9991

[Tim Friedrich Brüggemann]

any updates on this? @florian262000 @TibiIius @Tomyk9991

After rewriting the backend COPIUM

[Tomyk]

LGTM LULW