Consider extracting the driver library to a standalone package

If one wants to build a custom app for their smartscreen by using the driver library code, it is currently very annoying to do so because:

1. the driver library is part of the whole project which contains many more dependencies (UI libs, sensor libs...) that are not useful for the driver itself
2. the project is not properly packaged and published to PyPI like a normal Python package

I think you should consider extracting the driver library to its own repository, add the proper packaging info, and publish it to PyPI. Actually, maybe a dedicated repo is not required and some custom build/packaging could do the trick to extract just the driver with just its required deps and make a package out of that.

FYI, I did an extract of the driver myself here: hchargois/smartscreen-driver and published it to PyPI. I also fixed all the PEP8 naming violations and simplified the code by removing all the widgets which don't really belong in the driver IMO. The driver in my repo only exposes a paint() (aka DisplayPILImage) to push bitmaps to the screen. I made that repo for my own use out of necessity, I'm not very much interested in maintaining it.

Start by reviewing the existing driver code in this repository and comparing it with the extracted implementation in hchargois/smartscreen-driver. Determine the required driver-only dependencies and packaging approach; done means the driver can be installed and used independently as a normal PyPI package without the unrelated project dependencies.