🎨 Add switch UI component

src/components/ui/switch/index.ts

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+import Root from "./switch.svelte";
+
+export { Root, Root as Switch };

src/components/ui/switch/switch.svelte

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+<script lang="ts">
+  import type { WithoutChildrenOrChild } from "@/types/components";
+
+  import { cn } from "@/utils/cn";
+  import { Switch as SwitchPrimitive } from "bits-ui";
+
+  let {
+    ref = $bindable(null),
+    class: className,
+    checked = $bindable(false),
+    ...restProps
+  }: WithoutChildrenOrChild<SwitchPrimitive.RootProps> = $props();
+</script>
+
+<SwitchPrimitive.Root
+  bind:ref
+  bind:checked
+  data-slot="switch"
+  class={cn(
+    "peer inline-flex h-[1.15rem] w-8 shrink-0 items-center rounded-full border border-transparent shadow-xs transition-all outline-none focus-visible:border-neutral-500 focus-visible:ring-[3px] focus-visible:ring-neutral-300/50 disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:bg-neutral-900 data-[state=unchecked]:bg-neutral-200 dark:focus-visible:ring-neutral-500/50 dark:data-[state=checked]:bg-neutral-100 dark:data-[state=unchecked]:bg-neutral-700",
+    className,
+  )}
+  {...restProps}
+>
+  <SwitchPrimitive.Thumb
+    data-slot="switch-thumb"
+    class={cn(
+      "pointer-events-none block size-4 rounded-full bg-white ring-0 transition-transform data-[state=checked]:translate-x-[calc(100%-2px)] data-[state=checked]:bg-white data-[state=unchecked]:translate-x-0 dark:bg-neutral-900 dark:data-[state=checked]:bg-neutral-900",
+    )}
+  />
+</SwitchPrimitive.Root>