Should webnative have a tree-walking utility function?

[jeffgca]

NB: Feature requests will only be considered if they solve a pain

Summary

UNIX tree is useful, and can be run in ways that prevents performance problems with large filesystems by limiting the types of things listed and the depth of the listing. You can implement a naive version of this using existing methods but it might be a better developer experience to have one we create that has performance-preserving features and defaults? cc @bgins for the idea.

[bgins]

Related to #460 where we could potentially use a feature like this.