feat(localization): expand language support and enhance UI for user settings

- Added support for additional UI locales including Cebuano and Spanish, improving accessibility for a broader user base.
- Updated language selection components in the AppHeader and SettingsWidget to reflect new language options, enhancing user experience.
- Enhanced localization of various UI elements across components, ensuring consistent language representation and improved user engagement.
- Implemented logic to synchronize user language preferences with backend settings, providing a seamless experience when changing languages.

frontend/src/i18n/locales/ceb/admin.json

@@ -0,0 +1,41 @@
+{
+  "admin": {
+    "interests": {
+      "title": "[Admin] - Pagdumala sa mga interes"
+    },
+    "contacts": {
+      "title": "[Admin] - Mga hangyo sa pakigkontak",
+      "date": "Petsa",
+      "from": "Gikan kang",
+      "actions": "Mga aksyon",
+      "open": "Ablihi",
+      "finished": "Tapusa"
+    },
+    "editcontactrequest": {
+      "title": "[Admin] - Usba ang hangyo sa pakigkontak"
+    },
+    "user": {
+      "name": "Ngalan sa user",
+      "active": "Aktibo",
+      "blocked": "Gi-block",
+      "actions": "Mga aksyon",
+      "search": "Pangita"
+    },
+    "rights": {
+      "add": "Idugang ang katungod",
+      "select": "Palihog pagpili",
+      "current": "Karon nga mga katungod"
+    },
+    "forum": {
+      "title": "[Admin] - Forum",
+      "currentForums": "Anaa nang mga forum",
+      "edit": "Usba",
+      "delete": "Tangtanga",
+      "createForum": "Paghimo",
+      "forumName": "Titulo",
+      "create": "Paghimo",
+      "selectPermissions": "Palihog pagpili",
+      "confirmDeleteTitle": "Tangtanga ang forum"
+    }
+  }
+}