Add folder for TinyMCE's translation

[allinappliadmin]

Would it be possible to add a folder for the internationalization of TinyMCE: /packages/mosaico/dist/tinymce/langs with the official translation files found here: https://www.tiny.cloud/get-tiny/language-packages/
Each update for the extension on each of our instances implies to re-add this file manually (here for French)
fr_FR.js.zip