Add predicate variants to all casts

[janhohenheim]

Objective

• cast_ray already has a sister function called cast_ray_predicate that returns the first hit that satisfies a predicate. The other casts do not.

Solution

• Implement them. Note that I set the internal implementations of the non-predicate versions to use the predicate to reduce code duplication. The predicate does not introduce an extra branch since we already have an if for the filter in place, so this should be equivalent in performance.

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Changelog

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• Added
  • cast_ray already has a sister function called cast_ray_predicate that returns the first hit that satisfies a predicate. Now, the other cast function have a similar analogue:
    • Added cast_shape_predicate for cast_shape
    • Added project_point_predicate for project_point

[Jondolf]

Thanks!

(FYI I noticed the PR description mentioned cast_ray_predicate in the Added list even though it was probably intended to be cast_shape_predicate, so I edited the description. Hope that's fine 😄)