feat: RAR support (fix Windows)

[aaronleopold]

Moved off of my old (bad) in-place byte reading implementation and using the WIP 0.5 feature branch from the upstream unrar.rs. I had to make a few adjustments to get things compiling, but you can see the fork here

So far, tested on Windows and macOS. I will test Linux and Docker over the weekend 👏

[aaronleopold]

Soooo it seems to be working on macOS, Windows, and Linux when running from source. Docker still throws a seg fault when inline-reading bytes, however 😭

I'm inclined to merge this AS-IS, since it is better than it was as far as RAR support goes, but I don't want to dive too hard into C++ world right now to try and debug what is going on in Docker with unrar.rs. Conversions (which requires extracting the RAR files FULLY) also throws a seg-fault. So, I am not necessarily feeling this is necessarily an inline-reading problem anymore. I think the next steps once I have time might be to create an isolated Rust app with unrar.rs and run it in a docker container to see when and how it breaks.