Support compressed archives (zip, cbz, etc)

[source124]

Is your feature request related to a problem? Please describe.

I have to manually unpack zipped files before importing into NAPS2. And repack them after editing.

Describe the solution you'd like

Zipped archives are very convenient to handle scanned material. It would be awesome if NAPS2 supported them.

Describe alternatives you've considered

Manually as mentioned.

Additional context
Add any other context or screenshots about the feature request here.

[cyanfish]

I probably won't implement automatic repacking but it shouldn't be too difficult to allow importing zip files.

[source124]

Thank you. That's half-way there :)

As for packing, you don't have to implement it in the app. Just allow a setting to locate the 7z executable and call it.

[cyanfish]

#106