New port: graphics/instant-meshes: Interactive field-aligned mesh generator

This application is developed by Wenzel Jakob and implements a novel
approach in managing and display of 3D meshes.

See the screenshot here:
https://github.com/wjakob/instant-meshes/raw/master/resources/screenshot.jpg

PR: 222711
Submitted by: Greg V <greg@unrelenting.technology>
Approved by: tcberner (mentor)
Differential Revision: D13661