feat: add posts archive page, navigation links, and initial blog post.

Author: j031

_data/navigation.yml

@@ -3,6 +3,8 @@ main:
   url: "/"
 - title: "About"
   url: "/about/"
+- title: "Posts"
+  url: "/posts/"
 - title: "Tags"
   url: "/tags/"
 - title: "Terms & Privacy"

_pages/posts.md

@@ -0,0 +1,10 @@
+---
+layout: archive
+title: "All Posts"
+permalink: /posts/
+author_profile: true
+---
+
+{% for post in site.posts %}
+  {% include archive-single.html %}
+{% endfor %}