Release 4.8.3

Release: Partially update notebook viewer (#2465)

• For the notebook viewer this updates the version of three.js from 115
  -> 140 and rebuilds the trimesh.resources.viewer.zip artifact. The
  latest version of three.js is 180 but would require re-factoring the
  notebook viewer which probably should be done at some point.
• releases #2464
• add literals types instead of loose strings for BooleanEngineType,
  BooleanOperationType, and GraphEngineType, and apply them to boolean
  and graph functions that allow different engine options.
• pass through repair keyword argument from Trimesh.split to
  partially fix #2460
• deprecate trimesh.viewer.widget since glooey hasn't been updated
  since 2021, and the widget module isn't tested.
• stop running process=True on the outputs of manifold3d to fix #2466
• adds additional test case to hit the iteration path of
  trimesh.path.polygons.sample_polygon
• stop double-checking is_volume in mesh booleans to fix #2458
• Adds additional documentation recommending "a la carte" dependencies
  for people freezing, i.e. trimesh scipy vs trimesh[easy]