Dedicated implementation using TypeScript and Three.js

[innanyun]

I created a FOLD viewer (https://github.com/innanyun/fold-viewer-threejs) using TypeScript and Three.js.

I created it because I wanted an easy-to-use viewer and maintainable reference implementation of the FOLD specification that can easily reflect the development of the specification. Many viewer-related issues such as "Perspective Projection" (#11), "Rendering just vertices and edges" (#10), "Touch events" (#1), etc. could be easily solved.