feat: comments for blog posts

Author: jhrcook

content/posts/_index.md

@@ -1,3 +1,7 @@
 ---
 cardView: false
+
+cascade:
+    showComments: true
+    invertPagination: true
 ---

layouts/partials/comments.html

@@ -0,0 +1,8 @@
+<script src="https://giscus.app/client.js" data-repo="jhrcook/jhrcook-website" data-repo-id="R_kgDOLQ6jwQ"
+    data-category="Announcements" data-category-id="DIC_kwDOLQ6jwc4CdJHO" data-mapping="url" data-strict="0"
+    data-reactions-enabled="1" data-emit-metadata="0" data-input-position="top" data-theme="dark_dimmed" data-lang="en"
+    data-loading="lazy" crossorigin="anonymous" async>
+    </script>
+
+<!-- TODO: Would be nice if the theme switched according to the light or dark appearance of the website. Too complicated for me, but this Issue is working on the implementation. <https://github.com/giscus/giscus/issues/1200>
+ -->