restructure for sveltekit

src/lib/ui/Error.svelte

@@ -0,0 +1,24 @@
+<script>
+    export let msg = "";
+    export let trace = "";
+</script>
+
+<div class="error">
+    {#if msg}
+        <p class="msg">{@html msg}</p>
+    {/if}
+    {#if trace}
+        <pre class="trace">{trace}</pre>
+    {/if}
+    <slot></slot>
+</div>
+
+<style>
+    .error {
+        margin-top: 16px;
+        padding: 20px 32px;
+        border: 1px solid #8884;
+        border-radius: 16px;
+        background-color: var(--bg1);
+    }
+</style>