[P1] Compatibility with tooling that expects a HF transformer model

[chris-aeviator]

I'm raising the issue that in terms of "production readyness" (statet goal) pyreft, designed as a very thoughtful library, will need to work together with tooling that expects a loadable vanilla transformer model. A real world reproducible example is loading a pyvene trained model with https://github.com/outlines-dev/outlines in order to create structured json/ schema following outputs.

While the model can be accessed via pyref_model.model - it is not loadable, and in any case one tool would miss the other's functionality when loaded this way. What would be a advisable strategy to integrate with other tooling? May I suggest also different backend engines (e.g. vllm, ollama, llama.cpp) will need to have have interfaces to pyreft. Maybe I'm overseeing some documentation here but I'm unsure how to proceed.

Is merging a pyvene intervention into the base model possible or is pyvene/pyreft more of an active component that will require code changes in any case?