Add BoundingBoxes class information

[MaKaNu]

🚀 The feature

Another meta field which includes the index of the corresponding class of the BoudingBox.

Motivation, pitch

At the moment, I need to carry the class indices of the BoundingBoxes separate. This leads to the issue, that I need to carry it around everywhere I need to access the bbox.

Additional when creating a BBox the class creation method (init/new?) can guard against wrong shapes, if this optional feature is used.

Alternatives

No response

Additional context

No response

[MaKaNu]

@NicolasHug I don't actually know who to ask, but what is the right approach to a bot implementation like the above?