Initial commit with files

Still need to fix the imports

src/lib/components/listbox/ListboxLabel.svelte

@@ -0,0 +1,20 @@
+<script lang="ts">
+    import { getContext } from "svelte";
+    import { ListboxStates, StateDefinition } from "./Listbox.svelte";
+    import { useId } from "./use-id";
+    let api: SvelteStore<StateDefinition> = getContext("api");
+    let id = `headlessui-listbox-label-${useId()}`;
+    let labelStore: SvelteStore<HTMLLabelElement> = getContext("labelStore");
+
+    function handleClick() {
+        $api.buttonRef?.focus({ preventScroll: true });
+    }
+</script>
+
+<!-- svelte-ignore a11y-label-has-associated-control -->
+<label {...$$restProps} {id} bind:this={$labelStore} on:click={handleClick}>
+    <slot
+        open={$api.listboxState === ListboxStates.Open}
+        disabled={$api.disabled}
+    />
+</label>