finite-coordinate validation

[NailxSharipov]

Where to add is_finite() api?

As for me ShapeResource<P> looks like a best candidate.

The only problem I see is that it only works with contours, and if for some reason we need detailed information, it is not very suitable to much.

the api can look like fn validate_coordinates(&self) -> Result<(), InvalidGeometry> could reject NaN, +inf, and -inf and return the failing path/point index.

[LucaCappelletti94]

While we can certainly centralize the validation logic in ShapeResource, the primary issue would be to change the signature of methods that can fail to return a Result instead of mangling the result / panicking in debug mode.