Adding custom content

[xeon826]

Hello, I added a tab in the tinymce pop up to allow the user to add custom content like image, title, description and it works as far as I can tell, I just wanted to run it by you to see if you had any suggestions https://github.com/DELT-stl/content-cards
I was also wondering if their might be a way to use tinymce to open a file browser in the media library but as far as I can tell, the editor doesn't have this option.