interface for downloading/loading wandb & local models

[rusheb]

Description

Provide an API for downloading and loading a model from Weights & Biases (w&b) and another API for loading a locally stored model. The aim is to enable researchers to seamlessly run experiments on all trained models.

Acceptance Criteria

• Implement an API for downloading and loading a model from w&b
• Implement an API for loading a locally stored model

Additional Notes

• Consider updating load_model_with_configs to accept a local run.
• Evaluate the current file structure for saving local runs and consider using the w&b artifact cache instead.
• Investigate storage limits for w&b, as this could become a limiting factor

[mivanit]

• loading a locally stored model implemented in Zanj integration: Models #157
• some progress maze on loading models from wandb in Fix dataset split, pt to zanj model conversion code #190, but this is only for loading .pt models from @afspies's runs. loading a ZANJ model from wandb should be as simple as loading a file

[traeuker]

Seems like a mix of "sort of done" and maybe "not worth spending too much more time on it?" @mivanit I put it in your hands