Add definition for define()

[oktaal]

I've added a TypeScript definition for the define() method in ace. I'm using this method to define a custom mode and include it.

Example custom mode declaration:

import 'brace/mode/abc'; // of course you can extend whatever mode you want
import * as ace from 'brace';
let AbcMode: { new(): any } = ace.acequire('ace/mode/abc').Mode;

export const modeName = 'my-custom-mode';
export default class MyCustomMode extends AbcMode {
    constructor() {
        super();
    }
}
ace.define(modeName, [], { Mode: MyCustomMode });

The mode can then simply be imported as follows:

import * as ace from 'brace';
import { modeName } from './my-custom-mode';

let editor = ace.edit(element);
let session = editor.getSession();
session.setMode(modeName);

[tbekolay]

Hi @oktaal, the TypeScript definitions here are generated by a script that makes slight modifications to the DefinitelyTyped typings. It would be best if you made your PR on the DefinitelyTyped definitions instead, so that we can pull those in here.