enh: youtube watch param support

src/routes/watch/+page.svelte

@@ -0,0 +1,22 @@
+<script>
+	import { onMount } from 'svelte';
+	import { goto } from '$app/navigation';
+
+	onMount(() => {
+		// Get the current URL search parameters
+		const params = new URLSearchParams(window.location.search);
+
+		// Check if 'v' parameter exists
+		if (params.has('v')) {
+			// Get the value of 'v' parameter
+			const videoId = params.get('v');
+
+			// Redirect to root with 'youtube' parameter
+
+			goto(`/?youtube=${encodeURIComponent(videoId)}`);
+		} else {
+			// Redirect to root if 'v' parameter doesn't exist
+			goto('/');
+		}
+	});
+</script>