refactor: remove Pagination component and restructure blog page

- Deleted the Pagination component as it is no longer needed.
- Refactored the blog page to directly display posts without pagination.
- Introduced a new index page to list all blog posts in a single view.

src/pages/index.astro

@@ -0,0 +1,17 @@
+---
+import { getCollection } from "astro:content";
+import Layout from "../layouts/BaseLayout.astro";
+import PostSummary from "../components/PostSummary.astro";
+
+const posts = await getCollection("blog", ({ data }) => {
+	return data.draft !== true;
+});
+
+posts.sort((a, b) => b.data.pubDate.getTime() - a.data.pubDate.getTime());
+---
+
+<Layout>
+	<section style={{ "margin-top": "3rem" }}>
+		{posts.map((post) => <PostSummary post={post} />)}
+	</section>
+</Layout>