Add llm-ollama package

[nick4eva]

I'd like to have package llm-ollama in nixhub.io (which is ollama plugin for llm) so I can install it with existing llm package. https://github.com/taketwo/llm-ollama

[glennpratt]

I could be wrong, but I'd assume it needs to be in nixpkgs first: https://github.com/NixOS/nixpkgs

[nick4eva]

@glennpratt do you know easy way how to add it to nixpkgs?