feat(i18n): add batch group switch text to English, Nepali, and Chinese locales

- Updated the English, Nepali, and Chinese locale files to include a new translation for "Toggle batch switch for {{group}}".
- Enhanced internationalization support for the admin interface by adding relevant strings for improved user experience.

src/i18n/locales/en/config.json

@@ -236,7 +236,8 @@
       "readOnly": "Read only"
     },
     "aria": {
-      "enablePlay": "Enable {{playCode}}"
+      "enablePlay": "Enable {{playCode}}",
+      "batchGroupSwitch": "Toggle batch switch for {{group}}"
     },
     "nameDialog": {
       "title": "Edit display name",