Carousel: add dot indicator

[ConcernedHobbit]

add dot indicator for amount of slides and where we're currently at, unless there are no other slide views

[Jokauppi]

There's already a good hook and component for this in the embla examples:

https://codesandbox.io/p/sandbox/embla-carousel-default-react-ww73yq?file=%2Fsrc%2Fjs%2FEmblaCarouselDotButton.tsx

Though we can probably strip away the click features