chore: use import type for type only file import (#263)

Author: sapphi-red

playground/ssr-vue/src/components/ImportType.vue

@@ -3,6 +3,9 @@
 </template>
 
 <script setup lang="ts">
-import { Foo } from '@vitejs/test-dep-import-type/deep'
+// FIXME: @vitejs/test-dep-import-type/deep is a type only file
+//        So currently it needs to be imported with `import type`
+//        https://github.com/vitejs/vite-plugin-vue/issues/24
+import type { Foo } from '@vitejs/test-dep-import-type/deep'
 const msg: Foo = {}
 </script>