Implement saliency methods (from: The elephant in the interpretability room: Why use attention as explanation when we have saliency methods?)

it seems like there is no implementation available so the actual todo is:

- [ ] implement the paper
- [ ] provide an api like `import saliency_interpret; saliency_interpret(huggingface_model_name, path_to_data)`

Start by reading the paper named in the issue to determine the saliency methods and required inputs. Then identify the project entry point, since no files or tests are specified, and define the public API around a Hugging Face model name and a data path. Done means the paper's methods are implemented and the requested import-and-call interface is available.

Written by the indexing model from the issue text.