Initial file structure for CLI.

[albertpurnama]

I'm intentionally not linking the GH issue because it doesn't solve the issue yet. This is merely a quick vibe check on the folder/cmd structure.

Initial implementation of llmgo's CLI.

Here's a demo video

https://github.com/joshcarp/llm.go/assets/14824254/6e8be9c7-8b83-4f36-bbe6-799eeeab273d

I'm opening this PR early to get feedback on the structure of the command itself.

[joshcarp]

Works better than I expected, I haven't looked at the parameter/tokenizer binary files but what do you think about having them load directly from huggingface?

We'll put it in another issue, but having it load from here: https://huggingface.co/joshcarp/llm.go/tree/main for example would mean that we could unlock the potential to go install it as a CLI.

[albertpurnama]

Resolved @joshcarp !

[joshcarp]

Thanks @albertpurnama!