feat: implement project status management with 'on_hold' state and associated UI updates

-feat: ability to hard delete projects, plus a soft delete with auto pruning.

templates/partials/projects/project_list.html

@@ -34,6 +34,10 @@
                     <span class="px-2 py-1 text-xs font-medium bg-green-100 text-green-800 dark:bg-green-900/30 dark:text-green-400 rounded-full">
                         Active
                     </span>
+                {% elif item.project.status == 'on_hold' %}
+                    <span class="px-2 py-1 text-xs font-medium bg-amber-100 text-amber-800 dark:bg-amber-900/30 dark:text-amber-400 rounded-full">
+                        On Hold
+                    </span>
                 {% elif item.project.status == 'completed' %}
                     <span class="px-2 py-1 text-xs font-medium bg-blue-100 text-blue-800 dark:bg-blue-900/30 dark:text-blue-400 rounded-full">
                         Completed