Implement String Iterator ( String.prototype[@@Symbol.iterator] )

[HalidOdat]

ECMASCript feature
Explain the ECMAScript feature that you'd like to see implemented.

Implementing String.prototype[@@Symbol.iterator]

Example:

let iter = new String("Hello World")[Symbol.iterator]();
let next = iter.next();
console.log(next.value) // "H"
iter.next()
console.log(next.value) // "e"
iter.next()
// ...

[HalidOdat]

This is a duplicate of #752 so closing this