Update get and set section with eslint instructions

[ASH-Michael]

With the addition of eslint-plugin-ember in our projects, we can add a rule to our .eslintrc file to enforce the proper use of get, set, and setProperties.

I propose we update this section to include instructions for that.

[ASH-Anthony]

@ASH-Michael can you elaborate on the specific rules?

[ASH-Michael]

To configure this in the .eslintrc file, you would just need to add this rule to the rules: object...

ember/use-ember-get-and-set: 2

//or

ember/use-ember-get-and-set: [2, {
  ignoreThisExpressions: false,
}]

This will enforce the proper use of get and set in your projects.

//bad
this.get('fooProperty');
this.set('fooProperty', 'bar');
this.getWithDefault('fooProperty', 'defaultProp');
object.get('fooProperty');
object.getProperties('foo', 'bar');
object.setProperties({ foo: 'bar', baz: 'qux' });

//good
get(this, 'fooProperty');
set(this, 'fooProperty', 'bar');
getWithDefault(this, 'fooProperty', 'defaultProp');
get(object, 'fooProperty');
getProperties(object, 'foo', 'bar');
setProperties(object, { foo: 'bar', baz: 'qux' });