feat: created index pages for posts and recipes

posts-index.njk

@@ -0,0 +1,26 @@
+---
+layout: base.njk
+title: All Blog Posts
+description: All blog posts on Volpe.
+permalink: /posts/
+---
+
+<h1>Blog Posts</h1>
+
+{% if collections.posts.length > 0 %}
+<ul class="post-list">
+  {% for post in collections.posts %}
+  <li>
+    <a href="{{ post.url }}" class="post-card">
+      <h2>{{ post.data.title }}</h2>
+      <time datetime="{{ post.data.createdAt | dateTimeFormat }}">{{ post.data.createdAt | dateTimeFormat }}</time>
+      {% if post.data.description %}
+      <p>{{ post.data.description }}</p>
+      {% endif %}
+    </a>
+  </li>
+  {% endfor %}
+</ul>
+{% else %}
+<p>No blog posts yet.</p>
+{% endif %}