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/accreditation.json

@@ -16,12 +16,18 @@
     ]
   },
   "hero": {
-    "badge": "Excellence Assured",
+    "badge": "Accreditation Save Check",
     "title": "ACCREDITATION AND RECOGNITION",
     "description": "At the London Academy of Management and Sciences (LAMS), we are committed to maintaining the highest academic standards and delivering quality education that aligns with international benchmarks. Our accreditations reflect our dedication to excellence, credibility, and continuous improvement in higher education and professional learning."
   },
   "grid": {
-    "tabs": ["All", "Registry", "Certification", "Accreditation", "Quality Assurance"],
+    "tabs": [
+      "All",
+      "Registry",
+      "Certification",
+      "Accreditation",
+      "Quality Assurance"
+    ],
     "items": [
       {
         "id": "ukrlp",
@@ -85,4 +91,4 @@
       }
     ]
   }
-}
+}