Add IIIIF dataclasses

[rwood-97]

Summary

Review #26 first

This PR adds dataclasses for parsing various different types of IIIF presentation/image API files.

Needed for MapReader IIIF development (https://github.com/maps-as-data/MapReader/pull/554)

Describe your changes

• Adds iiif_dataclasses with methods for reading presentation2, presentation3, image2 and image3 apis.
• Adds load_iiif.py
• Updates pre-commit/ruff

Checklist before assigning a reviewer (update as needed)

• [ ] Self-review code
• [ ] Ensure submission passes current tests
• [ ] Add tests
• [ ] Update relevant docs
• [ ] Update changelog

Reviewer checklist

Please add anything you want reviewers to specifically focus/comment on.

• [ ] Everything looks ok?