scipp/plopp: 26.3.0

What's Changed

• Updates to inspector plot: add rectangle mode and fix operation inside polygons by @nvaytet in https://github.com/scipp/plopp/pull/528
• Include upper bound in 3d view V-cut by @nvaytet in https://github.com/scipp/plopp/pull/531
• Add missing opacity argument to scatter3d docstring by @nvaytet in https://github.com/scipp/plopp/pull/533
• Make functions in data.examples return loaded DataArrays instead of paths by @nvaytet in https://github.com/scipp/plopp/pull/530
• Add option to disable perspective in 3d plots by @nvaytet in https://github.com/scipp/plopp/pull/540
• Add option to disable continuous update in inspector plot by @nvaytet in https://github.com/scipp/plopp/pull/539
• Combined slider for slicer plots by @nvaytet in https://github.com/scipp/plopp/pull/538

Full Changelog: https://github.com/scipp/plopp/compare/26.2.1...26.3.0