feature request: Could we add a preview feature in the right-hand window?

[est7]

This is really a great project! Could we provide a preview of the text file on the right side? It would be a great way to confirm whether we need to select that file.

[epilande]

Yes, this would be a great addition! If you're up for it, feel free to open a PR. If not, I'll probably get to it over the weekend