feature: Support remote ollama service hosts

[jpmcb]

nvim-llama should support using a remote ollama host: ollama supports this out of the box with a OLLAMA_HOST env variable but using docker, we'll need to inspect this manually and pass that to the docker client container or add it as an optional setting.

[catdevman]

Along these same line it would be nice if it could detect that a local copy of the ollama service is already running and just use that interface instead of the ad hoc docker commands.