[FEAT] Add function-prototype-extensions-on codemod

[rajasegar]

#21

function-prototype-extensions.on

Historically, Ember has extended the Function.prototype with a few functions (on, observes, property), over time we have moved away from using these prototype extended functions in favor of using the official ES modules based API.

In order to migrate away from Function.prototype.on you would update to using @ember/object/evented

Before

import EmberObject from '@ember/object';
import { sendEvent } from '@ember/object/events';

let Job = EmberObject.extend({
  logCompleted: function() {
    console.log('Job completed!');
  }.on('completed')
});

let job = Job.create();

sendEvent(job, 'completed'); // Logs 'Job completed!'

After

import EmberObject from '@ember/object';
import { on } from '@ember/object/evented';
import { sendEvent } from '@ember/object/events';

let Job = EmberObject.extend({
  logCompleted: on('completed', function() {
    console.log('Job completed!');
  })
});

let job = Job.create();

sendEvent(job, 'completed'); // Logs 'Job completed!'