feat: Enhance project and reservation management

- Updated reservation list to display estimated units and improved count display.
- Added "Upcoming" status to project dashboard and header with corresponding styles.
- Implemented a dropdown for quick status updates in project header.
- Modified project list compact view to reflect new status labels.
- Updated project overview to include a tab for upcoming projects.
- Added migration script to introduce estimated_units column in job_reservations table.

templates/partials/projects/project_dashboard.html

@@ -11,7 +11,9 @@
                 {% endif %}
             </p>
         </div>
-        {% if project.status == 'active' %}
+        {% if project.status == 'upcoming' %}
+            <span class="px-3 py-1 text-xs font-medium bg-purple-100 text-purple-800 dark:bg-purple-900/30 dark:text-purple-300 rounded-full">Upcoming</span>
+        {% elif project.status == 'active' %}
             <span class="px-3 py-1 text-xs font-medium bg-green-100 text-green-800 dark:bg-green-900/30 dark:text-green-300 rounded-full">Active</span>
         {% elif project.status == 'on_hold' %}
             <span class="px-3 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>