chore: Translate transifex_input.json in ar

83% of minimum 30% reviewed source file: 'transifex_input.json'
on 'ar'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

translations/frontend-app-library-authoring/src/i18n/messages/ar.json

@@ -229,7 +229,7 @@
   "library.list.filter.options.type.label": "النوع",
   "library.list.filter.options.type.types": "الأنواع",
   "library.list.filter.options.type.legacy": "",
-  "library.list.filter.options.type.complex": "",
+  "library.list.filter.options.type.complex": "مجمع (beta)",
   "library.list.filter.options.type.video": "",
   "library.list.filter.options.type.problem": "",
   "library.list.aside.title": "",