chore: upgrade to nuxt 4

app/components/Date.vue

@@ -0,0 +1,13 @@
+<script setup lang="ts">
+import { getPrettyDate, getUtcDate } from "@/shared/metadata";
+import type { AnyParsedContent } from "@/shared/types";
+
+const { doc } = defineProps<{ doc: AnyParsedContent }>();
+
+const prettyDate = getPrettyDate(doc);
+const utcDate = getUtcDate(doc);
+</script>
+
+<template>
+  <time pubdate :datetime="utcDate">{{ prettyDate }}</time>
+</template>