chore(deps): update rust crate visioncortex to 0.9

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	Pending
visioncortex (source)	dependencies	minor	0.8 → 0.9	0.9.2

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Release Notes

visioncortex/visioncortex (visioncortex)

v0.9.1

• Fixed cubic Bezier fitting swinging far away from the input on sparse,
  unevenly spaced slices (e.g. a 3 px jog followed by a 160 px straight leg —
  real walker output): the fit error was only measured at the sample points,
  so a lone cubic could interpolate every sample while ballooning between
  them. fit_points_with_beziers densifies the slice with witness points and
  returns the full multi-curve chain (welded and endpoint-pinned) instead of
  truncating to the first fragment; Spline::from_path_f64 now keeps every
  cubic of the chain. The single-curve fit_points_with_bezier is kept for
  compatibility but its truncation caveat is documented.

v0.9.0

• Added the polypartition module: polygon triangulation (ear-clipping,
  monotone, optimal dynamic programming) and hole removal, ported from
  PolyPartition by Ivan Fratric
• Made SubdivideSmooth public and added open-path (open polyline) variants of
  find_corners, find_splice_points, and subdivide_keep_corners;
  fit_points_with_bezier now takes a configurable max_error (closed-path
  behaviour unchanged)
• Breaking: color_clusters::Builder, BuilderImpl, and
  IncrementalBuilder are now generic over their four closure types instead of
  storing Box<dyn Fn>, so the hot same/diff closures are monomorphised and
  inlined
• Breaking: the deepen/hollow closures now receive &ClustersView
  instead of &BuilderImpl
• Breaking: color_clusters::Builder is now a type-state builder — every
  closure must be set before run()/start(), which is now enforced at compile
  time instead of panicking at runtime

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