feat: rebuild site content management

Replace legacy FAQ, downloads, and release flows with project and blog publishing. Add configurable branding and theme fields plus clean-start Compose seeding support.

templates/partials/_pagination.html

@@ -0,0 +1,7 @@
+{% if page_obj and page_obj.paginator.num_pages > 1 %}
+<nav class="pagination" aria-label="Pagination">
+  {% if page_obj.has_previous %}<a class="btn-ghost btn-sm" href="?page={{ page_obj.previous_page_number }}">Previous</a>{% endif %}
+  <span>Page {{ page_obj.number }} of {{ page_obj.paginator.num_pages }}</span>
+  {% if page_obj.has_next %}<a class="btn-ghost btn-sm" href="?page={{ page_obj.next_page_number }}">Next</a>{% endif %}
+</nav>
+{% endif %}