feat(#5): Add cookie consent banner

src/lib/components/CookieConsent.svelte

@@ -0,0 +1,37 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { isBrowser } from '@supabase/ssr';
+
+	let showBanner = false;
+
+	const acceptCookies = () => {
+		if (isBrowser()) {
+			localStorage.setItem('cookiesAccepted', 'true');
+			showBanner = false;
+		}
+
+		location.reload();
+	};
+
+	let cookiesAccepted = false;
+
+	onMount(() => {
+		if (isBrowser()) {
+			if (localStorage.getItem('cookiesAccepted')) {
+				cookiesAccepted = true;
+			}
+		}
+	});
+</script>
+
+{#if !cookiesAccepted}
+	<div class="fixed bottom-0 left-0 w-full bg-gray-800 text-white p-4">
+		<p class="text-sm">
+			We use cookies to ensure you get the best experience on our website. By continuing, you agree
+			to our use of cookies.
+		</p>
+		<button class="bg-blue-500 hover:bg-blue-600 px-4 py-2 rounded" on:click={acceptCookies}
+			>Accept</button
+		>
+	</div>
+{/if}