This came up in discussions with @gchindemi.

There are several publicly available pose datasets - e.g. CalMS21 and Rat7M.

We could add some functionality for easily fetching these data in movement, by following a similar strategy to our sample_data module, i.e. download with pooch, cache locally, and (optionally) load into a movement dataset.

Something like this would be useful for:

• us, because it would help us write tutorials/examples, and potentially to test and profile our code
• the community, especially developers of new methods, who could benefit from easy access to the various datasets and benchmarks during the prototyping phase

That said, we would have to think about somehow differentiating between publicly available datasets, and our own test data hosted on GIN (see also #237).