feat(post): add author

src/pages/posts/index.vue

@@ -7,7 +7,10 @@ const posts = usePosts()
 
   <ul>
     <li v-for="post in posts" :key="post.title">
-      <router-link :to="post.path" v-text="post.title" />
+      <router-link class="decoration-none" :to="post.path">
+        <span v-text="`${post.title}`" />
+        <span class="c-coolgray-400 ml-2ch font-bold" v-text="`by ${post.author}`" />
+      </router-link>
     </li>
   </ul>
 </template>