fix: add type annotations for imports in App.vue and Metadata.vue

Author: StarHeartHunt

src/App.vue

@@ -4,7 +4,7 @@ import { onMounted } from "vue";
 import hljs from "highlight.js/lib/core";
 import json from "highlight.js/lib/languages/json";
 import {
-  GlobalThemeOverrides,
+  type GlobalThemeOverrides,
   NBackTop,
   NConfigProvider,
   NLayout,

src/components/result-table/Metadata.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { h } from "vue";
 
-import { DataTableColumns, NDataTable, NText } from "naive-ui";
+import { type DataTableColumns, NDataTable, NText } from "naive-ui";
 
 import type { Metadata, Results } from "@/types/results";