Pagination dots: Add class as a prop

src/molecules/PaginationDots.svelte

@@ -3,11 +3,12 @@
     const dispatch = createEventDispatcher()
 
     // Props
+    export let className = ''
     export let photos
     export let currentIndex
 </script>
 
-<ol class="carousel__dots">
+<ol class={className}>
     {#each photos as dot, index}
     <li
         class:active={index === currentIndex}