Integration for Babylon.js

[repulsio]

In the README, there are integrations for Three JS and PlayCanvas, but not Babylon.js. It would be awesome if there was one for the best 3D engine 😄

[isaac-mason]

Hi, I am aware of this bablyon.js library that uses recast-navigation-js, which you could try: https://github.com/RolandCsibrei/babylonjs-recast-navigation-js

I don't actively use Bablyon.js so I'm unlikely to add integration or example myself. I'd consider accepting a PR similar to #438 if it's low maintenance.