Add basic pages for blog entries

src/pages/blog/[...slug].astro

@@ -0,0 +1,26 @@
+---
+import type { InferGetStaticPropsType, GetStaticPaths } from 'astro';
+import { getCollection } from 'astro:content';
+import Layout from '@layouts/Layout.astro';
+import Toc from '@components/Toc/Toc';
+
+export const getStaticPaths = (async () => {
+  const entries = await getCollection('blog');
+
+  return entries.map((entry) => ({
+    params: { slug: entry.slug },
+    props: entry,
+  }));
+}) satisfies GetStaticPaths;
+
+type Props = InferGetStaticPropsType<typeof getStaticPaths>;
+
+const entry = Astro.props;
+const { Content, headings } = await entry.render();
+---
+
+<Layout title={entry.data.title}>
+  <Toc headings={headings} />
+
+  <Content />
+</Layout>