Imported from GitHub feature request.

Source issue:

Original context from GitHub:

I am aware this is a markdown editor, but usually in my knowledge vault i also store PDFs and Images if they belong to the topic.

Currently clicking them openes MacOS preview App. I would much rather prefer a preview right inside Tolaria so I dont have to leave the App.

I added this feature to my fork of your app but maybe this would be interesting to other users as well? I can add a PR if you prefer.

Thank you for this great app!