feature: add necessary shadcn components for CategoryFilter and Sidebar

src/shared/ui/sidebar/sidebar-group-label.svelte

@@ -0,0 +1,34 @@
+<script lang="ts">
+    import { cn, type WithElementRef } from '$shared/utils/shadcn-utils.js';
+import type { Snippet } from 'svelte';
+import type { HTMLAttributes } from 'svelte/elements';
+
+let {
+    ref = $bindable(null),
+    children,
+    child,
+    class: className,
+    ...restProps
+}: WithElementRef<HTMLAttributes<HTMLElement>> & {
+    child?: Snippet<[{ props: Record<string, unknown> }]>;
+} = $props();
+
+const mergedProps = $derived({
+    class: cn(
+        'text-sidebar-foreground/70 ring-sidebar-ring flex h-8 shrink-0 items-center rounded-md px-2 text-xs font-medium outline-hidden transition-[margin,opacity] duration-200 ease-linear focus-visible:ring-2 [&>svg]:size-4 [&>svg]:shrink-0',
+        'group-data-[collapsible=icon]:-mt-8 group-data-[collapsible=icon]:opacity-0',
+        className,
+    ),
+    'data-slot': 'sidebar-group-label',
+    'data-sidebar': 'group-label',
+    ...restProps,
+});
+</script>
+
+{#if child}
+    {@render child({ props: mergedProps })}
+{:else}
+    <div bind:this={ref} {...mergedProps}>
+        {@render children?.()}
+    </div>
+{/if}