chore: purge shadcn from codebase. Replace with bits-ui components and other tools

src/shared/ui/Skeleton/Skeleton.svelte

@@ -3,7 +3,7 @@
     Generic loading placeholder with shimmer animation.
 -->
 <script lang="ts">
-import { cn } from '$shared/shadcn/utils/shadcn-utils';
+import clsx from 'clsx';
 import type { HTMLAttributes } from 'svelte/elements';
 
 interface Props extends HTMLAttributes<HTMLDivElement> {
@@ -18,7 +18,7 @@ let { class: className, animate = true, ...rest }: Props = $props();
 </script>
 
 <div
-    class={cn(
+    class={clsx(
         'rounded-md bg-background-subtle/50 backdrop-blur-sm',
         animate && 'animate-pulse',
         className,