front-end shortcode

I’ve only used this to display a list of some PDFs in a widget (using the plugin Shortcode Widget) and it’s good for that.
I am using a child theme but this plugin looks in the parent theme for your customised templates, so if you follow the instructions and put the media-category-library directory in the child theme it won’t be recognised.
Putting it in the parent theme probably won’t be a problem, theme upgrades are unlikely to delete it.