Maybe take a look at my Revoscan Player, a lot of usefull stuff already implemented between the main app and the helpers folder.
I have been researching into the idea of adding a timeline editor like the video ones that we could use to split arbitary frames into project scans;
Be able to browse projexts and create a project file from arbitary scan folder for example;
And be able to duplicate a project.
Personally i prefer my current method of removing frames by renaming file extensions to .x and having that way the ability to restore the frames if want to.
Also wanted to add the ability to duplicate scans/projects and rename scan folder on a project manager/bowser like the one i started sketching on the discussion page
I have also started a Github discussion page
And my early development log can be found here in the forum