Modal, BeforeContinueModal 컴포넌트 추가

src/lib/components/Modal.svelte

@@ -0,0 +1,32 @@
+<script lang="ts">
+  import type { Snippet } from "svelte";
+  import { fade } from "svelte/transition";
+
+  interface Props {
+    children: Snippet;
+    isOpen: boolean;
+  }
+
+  let { children, isOpen = $bindable() }: Props = $props();
+
+  const closeModal = () => {
+    isOpen = false;
+  };
+</script>
+
+{#if isOpen}
+  <!-- svelte-ignore a11y_click_events_have_key_events -->
+  <!-- svelte-ignore a11y_no_static_element_interactions -->
+  <div
+    onclick={closeModal}
+    class="fixed inset-0 flex items-center justify-center bg-black bg-opacity-50 px-2"
+  >
+    <div
+      onclick={(e) => e.stopPropagation()}
+      class="max-w-full rounded-2xl bg-white p-4"
+      transition:fade={{ duration: 100 }}
+    >
+      {@render children?.()}
+    </div>
+  </div>
+{/if}