refactor: move personal site to sites/nrd.sh/

Reorganize for monorepo structure:
- Move content/, templates/, static/, site.toml → sites/nrd.sh/
- Frees root for sukr docs site
- Build with: sukr -c sites/nrd.sh/site.toml

sites/nrd.sh/templates/content/post.html

@@ -0,0 +1,19 @@
+{% extends "base.html" %} {% block content %}
+<article class="post">
+  <header>
+    <h1>{{ page.title }}</h1>
+    {% if page.date %}
+    <time class="date">{{ page.date }}</time>
+    {% endif %} {% if page.description %}
+    <p class="description">{{ page.description }}</p>
+    {% endif %} {% if page.tags %}
+    <ul class="tags">
+      {% for tag in page.tags %}
+      <li><a href="{{ prefix }}/tags/{{ tag }}.html">{{ tag }}</a></li>
+      {% endfor %}
+    </ul>
+    {% endif %}
+  </header>
+  <section class="content">{{ content | safe }}</section>
+</article>
+{% endblock content %}