feat(cms): refactor page content management and implement detailed editors

Refactor the CMS page content system to use a more modular configuration-driven approach. This replaces the monolithic `pageContentConfig.js` with individual configuration files for each page and introduces a shared field utility to standardize editor components.
Key changes:
- Implement a generic `_renderSingletonPageView` helper to reduce duplication across controllers.
- Enhance `_createPageContentController` with `normalizeForEditor`, `normalizeForApi`, and `preparePayload` hooks for custom data transformation.
- Create dedicated configuration and view structures for Partnerships, History, Accreditation, Admissions, and Policies pages.
- Add a specialized section editor for Policies to manage complex nested content.
- Improve the frontend `page-content-editor.js` with support for visibility logic, auto-sequencing for arrays, and URL synchronization for active tabs.
- Update data JSON files to align with the new schema.

data/history.json

@@ -1,7 +1,7 @@
 {
   "highlight": {
     "icon": "fa-trophy",
-    "text": "2025 Milestone Reached: A Rapidly Growing Global Community!",
+    "text": "History Save Check",
     "linkLabel": "Read Full Story",
     "href": "#timeline-content"
   },
@@ -14,7 +14,12 @@
     "yearLabel": "Decade / Year",
     "categoryLabel": "Category",
     "buttonLabel": "Apply Filters",
-    "yearOptions": ["All Years", "2020 - Present", "2010 - 2019", "2005 - 2009"],
+    "yearOptions": [
+      "All Years",
+      "2020 - Present",
+      "2010 - 2019",
+      "2005 - 2009"
+    ],
     "categoryOptions": [
       "All Categories",
       "Academic Programs",
@@ -94,4 +99,4 @@
       }
     ]
   }
-}
+}