Add layout and data for posts

_includes/layouts/post.tsx

@@ -0,0 +1,9 @@
+export const layout = "./base.tsx";
+
+export default function({ children }) {
+  return (
+    <article>
+      { children }
+    </article>
+  );
+}

blog/posts/_data.yaml

@@ -0,0 +1,4 @@
+layout: layouts/post.tsx
+author:
+  name: Foster Hangdaan
+  email: foster@hangdaan.email