feat(cms): add management for partnerships, history, accreditation, admissions, and policies pages

Implement a singleton page content system to manage static informational pages. This includes:
- New controllers, models, and data files for Partnerships, History, Accreditation, Admissions, and Policies.
- Admin routes and views for updating page content.
- Public API endpoints for fetching page data.
- Migration scripts for initializing page data.
- Updated admin navigation layout to include a dropdown for "About" sections.
- Audit action constants for tracking updates to these pages.

views/layouts/main.ejs

@@ -720,9 +720,19 @@
               </li>
             </ul>
           </li>
-          <li class="nav-item">
-            <a class="nav-link <%= currentPath === '/admin/about-us' ? 'active' : '' %>"
-              href="/admin/about-us">About</a>
+          <li class="nav-item dropdown">
+            <a class="nav-link dropdown-toggle <%= ['/admin/about-us','/admin/partnerships','/admin/history','/admin/accreditation','/admin/admissions','/admin/policies'].includes(currentPath) ? 'active' : '' %>"
+              href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
+              About
+            </a>
+            <ul class="dropdown-menu">
+              <li><a class="dropdown-item <%= currentPath === '/admin/about-us' ? 'active' : '' %>" href="/admin/about-us">About Us</a></li>
+              <li><a class="dropdown-item <%= currentPath === '/admin/partnerships' ? 'active' : '' %>" href="/admin/partnerships">Partnerships</a></li>
+              <li><a class="dropdown-item <%= currentPath === '/admin/history' ? 'active' : '' %>" href="/admin/history">History</a></li>
+              <li><a class="dropdown-item <%= currentPath === '/admin/accreditation' ? 'active' : '' %>" href="/admin/accreditation">Accreditation</a></li>
+              <li><a class="dropdown-item <%= currentPath === '/admin/admissions' ? 'active' : '' %>" href="/admin/admissions">Admissions</a></li>
+              <li><a class="dropdown-item <%= currentPath === '/admin/policies' ? 'active' : '' %>" href="/admin/policies">Policies</a></li>
+            </ul>
           </li>
           <li class="nav-item">
             <a class="nav-link <%= currentPath === '/admin/service' ? 'active' : '' %>"
@@ -1149,4 +1159,4 @@
   <%- script %>
 </body>
 
-</html>
+</html>