feature: add necessary shadcn components for CategoryFilter and Sidebar

src/shared/ui/sidebar/sidebar-menu-item.svelte

@@ -0,0 +1,21 @@
+<script lang="ts">
+    import { cn, type WithElementRef } from '$shared/utils/shadcn-utils.js';
+import type { HTMLAttributes } from 'svelte/elements';
+
+let {
+    ref = $bindable(null),
+    class: className,
+    children,
+    ...restProps
+}: WithElementRef<HTMLAttributes<HTMLLIElement>, HTMLLIElement> = $props();
+</script>
+
+<li
+    bind:this={ref}
+    data-slot="sidebar-menu-item"
+    data-sidebar="menu-item"
+    class={cn('group/menu-item relative', className)}
+    {...restProps}
+>
+    {@render children?.()}
+</li>