Revert "chore(blog): remove the blog listing page"

This reverts commit e37e41254c.

src/pages/blog/index.astro

@@ -0,0 +1,32 @@
+---
+import ListingPage from "~/components/ListingPage.astro";
+import PageLayout from "~/layouts/PageLayout.astro";
+import { getCollection } from 'astro:content';
+
+const posts = await getCollection('blog');
+
+// TODO: show all posts when running locally.
+const filteredPosts = posts
+  .filter((post) => !post.data.draft)
+  .filter((post) => post.data.date);
+
+const sortedPosts = filteredPosts
+  .map((post) => {
+    const slug = `/blog/${post.slug}`;
+
+    return { item: post, slug };
+  })
+  .sort(
+    (a, b) =>
+      new Date(b.item.data.date).valueOf() -
+      new Date(a.item.data.date).valueOf()
+  );
+---
+
+<ListingPage items={sortedPosts} title="Blog">
+  <p slot="intro">
+    This is where I publish my personal blog posts as well as technical posts
+    and tutorials on topics such as Drupal, PHP, Tailwind CSS, automated
+    testing, and systems administration.
+  </p>
+</ListingPage>