Initial commit with files

Still need to fix the imports

src/lib/components/dialog/DialogOverlay.svelte

@@ -0,0 +1,20 @@
+<script lang="ts">
+    import { DialogStates, useDialogContext } from "./Dialog.svelte";
+    import { useId } from "./use-id";
+    let api = useDialogContext("DialogOverlay");
+    let id = `headlessui-dialog-overlay-${useId()}`;
+    function handleClick(event: MouseEvent) {
+        if (event.target !== event.currentTarget) return;
+        event.preventDefault();
+        event.stopPropagation();
+        $api.close();
+    }
+    $: propsWeControl = {
+        id,
+        "aria-hidden": true,
+    };
+</script>
+
+<div {...{ ...$$restProps, ...propsWeControl }} on:click={handleClick}>
+    <slot open={$api.dialogState === DialogStates.Open} />
+</div>