feat: add PWA support with service worker, offline sync, and connectivity banners

- Added PWA icons for 192x192 and 512x512 resolutions.
- Implemented service worker (sw.js) for caching static assets and handling fetch requests.
- Created ConnectivityBanner component to notify users of online/offline status.
- Developed OfflineSyncPanel component to manage and display offline sync status.
- Introduced PwaInstallPrompt component to prompt users for PWA installation.
- Added PwaRegistration component to handle service worker registration and online event handling.
- Created AdminAiAuditPage for AI audit logs with filtering and review functionality.
- Developed AdminDataEthicsPage to display AI data ethics summary and recent events.

web/experience/public/manifest.webmanifest

@@ -0,0 +1,25 @@
+{
+  "name": "OpenCCB Experience",
+  "short_name": "OpenCCB",
+  "description": "Aprendizaje en linea con soporte offline basico.",
+  "start_url": "/",
+  "scope": "/",
+  "display": "standalone",
+  "background_color": "#0b1220",
+  "theme_color": "#2563eb",
+  "orientation": "portrait-primary",
+  "icons": [
+    {
+      "src": "/pwa-icon-192.svg",
+      "sizes": "192x192",
+      "type": "image/svg+xml",
+      "purpose": "any"
+    },
+    {
+      "src": "/pwa-icon-512.svg",
+      "sizes": "512x512",
+      "type": "image/svg+xml",
+      "purpose": "any"
+    }
+  ]
+}