Implement LLaMA 3

[monatis]

This might be a good start because LLaMA is a very simple and well-known architecture. There is also a tutorial for porting weights from PyTorch. This class should subclass the base class in #10

[keshan]

I will give this a try

[monatis]

Hi @keshan, I'm on it and will make the PR shortly. Can you pick another one? For example, #12 might be a great addition.

[keshan]

ah ok, sure no problem