chore: Translate transifex_input.json in hi

99% of minimum 50% translated source file: 'transifex_input.json'
on 'hi'.

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

translations/frontend-app-course-authoring/src/i18n/messages/hi.json

@@ -441,6 +441,9 @@
   "course-authoring.course-team.warning-modal.button.return": "टीम लिस्टिंग पर लौटें",
   "course-authoring.course-unit.add.component.title": "एक नया घटक जोड़ें",
   "course-authoring.course-unit.add.component.button.text": "घटक जोड़ें:",
+  "course-authoring.course-unit.modal.button.text": "चुनना",
+  "course-authoring.course-unit.modal.container.title": "Add {componentTitle} component",
+  "course-authoring.course-unit.modal.container.cancel.button.text": "रद्द करें",
   "course-authoring.course-unit.heading.icon.chevron.alt": "ड्रॉपडाउन मेनू टॉगल करें",
   "course-authoring.course-unit.heading.breadcrumbs.loading": "लोड हो रहा है...",
   "course-authoring.course-unit.prev-btn-text": "पिछला",