Add a `sample_data` module

[sfmig]

Is your feature request related to a problem? Please describe.
It would be good to have a sample_data module to fetch files for our examples (similar to scikit-image

Describe the solution you'd like
An approach like the test data one using pooch should be good and consistent.

Describe alternatives you've considered
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Additional context
We would need to set up a corresponding GIN repository.

[HarshdipSaha]

hi @sfmig , I looked at pr #105 and would like to try completing the sample_data module, should I get working on it?

[swagat-mishra28]

Hello @sfmig ! I've opened a PR implementing the sample_data module using pooch.

Happy to make adjustments if needed.

[swagat-mishra28]

Hi @sfmig !As i said, I’ve opened a PR (#142) implementing the sample_data module using pooch for downloading example datasets.

The changes include:

• Adding a new module ethology/datasets/sample_data.py
• Implementing a load_sample_tracking() function that fetches and caches a sample dataset using pooch
• Exposing the function through ethology.datasets
• Adding pooch as a dependency

This sets up the basic structure for providing example datasets (similar to how scikit-image handles sample data). The placeholder URL can later be replaced once a GIN repository is configured.

Happy to adjust the implementation if needed. Thanks!