Add placeholder route for guides

src/routes/guides/+page.svelte

@@ -0,0 +1,31 @@
+<svelte:options runes={true} />
+
+<script lang="ts">
+	import { page } from '$app/stores'
+</script>
+
+<svelte:head>
+	<title>Guides</title>
+</svelte:head>
+
+<div class="container">
+	<h1>Guides</h1>
+	<p>Guides and resources for Granblue Fantasy players.</p>
+	<!-- Content will be added here -->
+</div>
+
+<style lang="scss">
+	.container {
+		padding: 2rem;
+		max-width: 1200px;
+		margin: 0 auto;
+
+		h1 {
+			margin-bottom: 1rem;
+		}
+
+		p {
+			color: var(--text-secondary);
+		}
+	}
+</style>