provide Intersection.distanceToRay for all objects

[trusktr]

Description

Not all objects provide distanceToRay when raycasting.

Solution

See Points.raycast. Seems easy to add to other objects for consistency.

Alternatives

don't add

Additional context

I updated the docs in

• Docs: Improve Raycaster page. #30478

but it would be better (and seemingly easy) to just add this property to Intersections of all objects.

[Mugen87]

The metric distanceToRay is added for points since it is already computed for the ray-points intersection test.

For meshes, it would be necessary to compute is separately although most use cases don't require it. So to avoid unnecessary overhead, it's better to let the app compute the distance.