Candid Parser (AST)

[krpeacock]

It should be possible to either code a full candid parser in JS, or to compile the Rust parser from https://github.com/dfinity/candid/tree/master/rust/candid into web assembly, and call it in your Web or Node.js application.

This was requested by @lastmjs in https://forum.dfinity.org/t/candid-parser-ast-in-javascript

How valuable would this be to people?