installation: add section about 3rd-party packages

[tomodachi94]

I made a Nixpkgs package for darklua. Others might also make packages, so I took initiative and made this section in the docs. It uses Repology's badge.

• add entry to the changelog This is a documentation change, I don't think a changelog entry is necessary. Please correct me if I am wrong.

[jeparlefrancais]

Thank you for taking the time to submit this!

I'm opened to setup the release job to automatically push the new versions in there. The release job is already building the binaries for all platforms and uploading them to github. I'm not familiar with nixpkgs but if you have a baseline or examples that would be great!

[tomodachi94]

I'm opened to setup the release job to automatically push the new versions in there. The release job is already building the binaries for all platforms and uploading them to github. I'm not familiar with nixpkgs but if you have a baseline or examples that would be great!

There's a bot in Nixpkgs that usually takes care of package updates (but it usually puts it through human review first), so there's nothing really to do on your end (and I don't mind updating it manually!). Nix also needs to build it from scratch due to the way that it functions, but thanks for the offer!

There's a thing called Nix flakes that you can use if you want, but the Nixpkgs setup works just fine too!