Implement Proxy built-in object

[Razican]

ECMASCript feature
ECMAScript allows using the Proxy object to re-define operations for normal objects, doing a "proxy" functionality. You can check how this works in the MDN, and in the specification.

Example code

const target = {
  message1: "hello",
  message2: "everyone"
};

const handler2 = {
  get: function(target, prop, receiver) {
    return "world";
  }
};

const proxy2 = new Proxy(target, handler2);

console.log(proxy2.message1); // world
console.log(proxy2.message2); // world

Tips for implementation
You can see #1033 to get ideas on how to implement the Proxy object. Some functionality (since it requires intercepting calls to other objects) might require some complex work. Feel free to ask for mentoring.

[teymour-aldridge]

I'm interested in working on this.

[Razican]

I'm interested in working on this.

I assigned it to you, let us know if you'd like any help!

[jedel1043]

@teymour-aldridge are you still working on this? The object API changed considerably to be more friendly when creating new exotic objects, maybe you could check it out if you have been having trouble implementing proxy objects!

[raskad]

Changed the assignment to me, as I did some testing and got a working prototype. @teymour-aldridge If you already did some work on this let me know!

[teymour-aldridge]

No worries; sorry, I was beleaguered with other things :)

[Razican]

@raskad, how is this going?

[raskad]

@raskad, how is this going?

I've got the full implementation ready. It just needs #1583 to merge

[jedel1043]

Merged #1583, should unblock this.