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.

controllers/accreditationController.js

@@ -1,11 +1,28 @@
 const AccreditationPage = require("../models/accreditationPage");
 const AUDIT_ACTIONS = require("../constants/auditAction");
-const pageContentConfig = require("../utils/pageContentConfig");
+const accreditationConfig = require("../utils/contentEditors/accreditationConfig");
 const createPageContentController = require("./_createPageContentController");
+const createRenderSingletonPageView = require("./_renderSingletonPageView");
 
-module.exports = createPageContentController({
+const controller = createPageContentController({
   model: AccreditationPage,
   modelName: "AccreditationPage",
   auditAction: AUDIT_ACTIONS.UPDATE_ACCREDITATION,
-  editorConfig: pageContentConfig.accreditation,
+  editorConfig: accreditationConfig,
 });
+
+controller.index = async function index(req, res) {
+  try {
+    return await createRenderSingletonPageView({
+      model: AccreditationPage,
+      editorConfig: accreditationConfig,
+      view: "admin/accreditation/index",
+    })(req, res);
+  } catch (error) {
+    console.error("accreditation index error:", error);
+    req.flash("error_msg", "Error loading Accreditation Management");
+    return req.session.save(() => res.redirect("/admin/dashboard"));
+  }
+};
+
+module.exports = controller;