add shadcn alert dialog

src/lib/components/ui/alert-dialog/alert-dialog-description.svelte

@@ -0,0 +1,17 @@
+<script lang="ts">
+	import { AlertDialog as AlertDialogPrimitive } from "bits-ui";
+	import { cn } from "$lib/utils.js";
+
+	let {
+		ref = $bindable(null),
+		class: className,
+		...restProps
+	}: AlertDialogPrimitive.DescriptionProps = $props();
+</script>
+
+<AlertDialogPrimitive.Description
+	bind:ref
+	data-slot="alert-dialog-description"
+	class={cn("text-muted-foreground text-sm", className)}
+	{...restProps}
+/>