Add back Windows support

[jesuslop]

I cloned the repo and run "pip install ." but the install complains of no pkg-config installed and certain djvu-libre header missing. Under posix the cure would be "well, install pkg-config". But in windows It doesn't seem fit. I've built dvju-libre from source without problem bit it does not produce a PC file that pkg-config (had I installed it) would use. There seems to be a missing step for your setup.py to find my compiled djvu libre files. I tried setting INCLUDE/LIB env vars to no avail. Djvu-libre can be installed via WinGet or Scoop package managers (at least the later has the development files (headers, libs, etc, still no .pc file)), but setup.py is not aware. This is kind of a problem in windows since much of the djvu tooling depends on this foundation package. I would prefer to avoid going the msys2 or cygwin routes.

[FriedrichFroebel]

As stated inside the README, I decided to drop Windows support when taking over maintenance in my fork - I am not using Windows at all and thus providing support for it is hard from my side.

If you want to further investigate this, feel free to experiment with the old approach by porting it where necessary. The relevant bits can be found be searching for dllpath on the original repository: https://github.com/search?q=repo%3Ajwilk-archive%2Fpython-djvulibre%20dllpath&type=code As for general questions, I might be able to help, but I am surely not able to help with actual Windows-related aspects.

Once you get this to work, you are indeed invited to submit a corresponding PR which includes running the build and tests on a Windows CI runner as well to ensure that everything keeps working as intended.

[jesuslop]

Ahh overlooked that win was dropped. Will get back if I get results.