3D pt. 2 - Support 3D centroids (+bounding box coords)

[ShrimpCryptid]

Use Case

Allow centroid data to be provided as 3D coordinates instead of 2D only.

Acceptance Criteria

• Add a flag in the dataset (either manifest or elsewhere) that causes centroids + bounding box coordinates to be parsed as 3D instead of 2D.
• Update all bounding-box- and centroid-related logic to return/handle 3D coordinates
  • For backwards compatibility with existing datasets, set the Z-value to 0 if coordinates are in 2D.

Details

• See related data ticket: Support user-provided 3D centroid coordinates colorizer-data#77