[ENH] Add RehabPile dataset collection

[sarthakuwar]

Reference Issues/PRs

Fixes #2989

What does this implement/fix? Explain your changes.

This PR introduces support for the RehabPile dataset collection, which contains time series datasets for both classification and regression tasks.

The implementation includes:

A new loader file, aeon/datasets/rehabpile_loader.py, which handles the dynamic discovery of datasets by scraping the source website (https://maxime-devanne.com/datasets/RehabPile/).

The load_rehabpile function downloads the required .npy files on demand and caches them locally, following the existing design pattern in aeon.datasets.

New public functions rehabpile_classification_datasets() and rehabpile_regression_datasets() to allow users to easily list all available datasets in the collection.

A new test file, aeon/datasets/tests/test_rehabpile_loader.py, to ensure the loader works correctly, handles errors, and can download from the archive.

The package's aeon/datasets/__init__.py has been updated to expose the new user-facing functions.

Does your contribution introduce a new dependency? If yes, which one?

No, this contribution does not introduce any new dependencies. It uses standard libraries and existing aeon dependencies like numpy and pandas.

Any other comments?

The new loader was designed to align closely with the existing architectural patterns of the aeon.datasets module, ensuring a consistent user experience and maintainability.

API documentation for the new functions may need to be added as a follow-up.

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[TonyBagnall]

hi, thanks for this, you might want to install pre-commit, that will pick up formatting errors before running CI

[sarthakuwar]

the CI is failing on a TimeCNNRegressor test in test_all_estimators.py, which seems unrelated to my dataset loader PR. I have already tried re-running the failed job, but the error persists.

[hadifawaz1999]

Thanks for this. The loader should take into consideration that there is multiple resamples (folds) per dataset. The default split to load should be always fold 0, but there is multiple folds per dataset. The information of number of folds (resamples or splits) per dataset is available here: https://github.com/MSD-IRIMAS/DeepRehabPile/blob/main/DeepRehabPileForExperiments.json

[MatthewMiddlehurst]

Maybe we need to start subgrouping these, it will get confusing if we start putting specific loaders alongside the general ones

[hadifawaz1999]

Thank you very much for your effort on this. I left some comments, with one additional functionality needed and others are docs stuff and placements

[hadifawaz1999]

Can you add the three functions to the api reference here ? https://github.com/aeon-toolkit/aeon/blob/main/docs/api_reference/datasets.md

[hadifawaz1999]

LGTM thanks