Add Support for Nix

[BeatLink]

Hey, it would be great if this package could be supported on NixOS

[nabilksabu]

Hey! I was wondering if it would be okay for me to create this for my NixOS installation since I needed a similar solution. I originally planned to work on it after my semester exams, but I got motivated and went ahead and built it already 😄

Here it is: https://github.com/nabilksabu/vantage-nix

Thanks a lot for the original software — it really helped. I’ve given proper credit, and please feel free to use or reference my version if you find it useful.