Qubes: Beta integration

[apyrgio]

For Qubes OS Beta integration, users should be able to enjoy most of the important features that Dangerzone provides in the other platforms:

• Qubes: Progress reports #429
• Qubes: Error handling #430
• Qubes: RPM Packaging #431
• Qubes: Client-side timeouts #446
• Qubes: Install all other OCR languages #438
• Qubes: Pass OCR parameters properly #455

Optional:

• Containers: have progress streamed instead of via mounted volumes (and deprecate doc_to_pixels_qubes_wrapper.py) #443

[deeplow]

• ✔️ OCR

This will present some challenges since alpine likely ships a different set of tesseract-ocr languages than fedora (on which our Qubes implementation be probably be based).

[deeplow]

• heavy_check_mark OCR

This will present some challenges since alpine likely ships a different set of tesseract-ocr languages than fedora (on which our Qubes implementation be probably be based).

No longer an issue thanks to #422

[deeplow]

• (optional) Containers: have progress streamed instead of via mounted volumes (and deprecate doc_to_pixels_qubes_wrapper.py) #443

I added an optional part, which is to harmonize the containers and Qubes version as I think it'll be needed anyways.

[apyrgio]

Now that streaming support for containers has been postponed for another release, and the rest of the tasks have completed, we can officially close this issue 🎉