Modeling documentation

[eliaszwang]

• [ ] move utils from physion to physopt.model.utils, clean up physion
• [ ] Update dataprovider with new file structure
• [ ] Document paths, naming of artifacts, make sure aligns with analysis code
• [ ] Add particle-based models to physopt
• [ ] In physopt, make it easy to only parts of the full pipeline. Document in README
• [ ] Update README for running each model
• [ ] In "Modeling Experiments" section of README: describe how to reproduce physion modeling results, provide final model checkpoints?
• [ ] create private+public repo setup

Check

• [ ] Can we train each model?
• [ ] Can we train the readout and evaluate on human test set?
• [ ] Can we generate the input files needed for analysis?
• [ ] Can we add new models easily?