[feature request] Oriented bounding box computation

This is useful in many contexts (e.g. to compare visually poses of different 3D reconstruction methods).

Ideally, it would directly support different representations: meshes, 3d point clouds.

This exists in CGAL: https://doc.cgal.org/latest/Optimal_bounding_box/index.html, but CGAL is quite hard to install

I also found this functionality in Open3D: http://www.open3d.org/docs/latest/python_api/open3d.geometry.OrientedBoundingBox.html and in trimesh: https://github.com/mikedh/trimesh/blob/3bbe6b368c723f171b9d1aa7c58cfbaf77279546/trimesh/bounds.py#L108

The issue names no repository files or tests. Start by comparing the linked CGAL, Open3D, and trimesh implementations and tracing how PyTorch3D represents meshes and 3D point clouds. Done means an agreed API and implementation plan for oriented bounding boxes covering the requested representations without requiring CGAL.

Written by the indexing model from the issue text.