draft new directory structure

[msalganik]

https://tree.nathanfriend.io/?s=(%27options!(%27fancy3~fullPath!false~trailingSlash3~rootDot3)~5(%275%276-fertility%2F*src.68s*2.evaluation.hf_inference.finetuning*output.wandb0base4tuned4slurm_scripts8ing.science%27)~version!%271%27)*%5Cn7.*70%20%7Bempty%7D*2recipes3!true4_models05source!6llama-27%20%208.test%0187654320.*

[varunsatish]

This should be added to the README also

[msalganik]

Here are some other ideas for making a default directory structure:

• https://cookiecutter-data-science.drivendata.org/#directory-structure
• https://gist.github.com/ericmjl/27e50331f24db3e8f957d1fe7bbbe510
• https://dev.to/luxacademy/generic-folder-structure-for-your-machine-learning-projects-4coe

I don't think we should follow any of these directly, but they might provide some ideas.