Handle block scoped alignement formatting

Add an option (or in default behavior) to handle block scoped alignement.

Object keys:

BAD

let test;

test = {
  property1: 'value1',
  property10: 'value10',
  property100: 'value100',

  propertyInAnotherBlock: 'valueInAnotherBlock',
  propertyWithNestedObject: {
    nestedProperty: 1
  },
  anotherPropertyWithNestedObject: {
    nestedProperty: 1
  }
}

GOOD

let test;

test = {
  property1   : 'value1',
  property10  : 'value10',
  property100 : 'value100',

  propertyInAnotherBlock   : 'valueInAnotherBlock',
  propertyWithNestedObject : {
    nestedProperty : 1
  },
  anotherPropertyWithNestedObject : {
    nestedProperty : 1
  }
}

Variables assignement:

BAD

let var1,
    var10 = 'first10',
    var100 = 'first100',

    varInAnotherBlock = 'valueInAnotherBlock';

var1 = 'value1';
var10 = 'value10';
var100 = 'value100';

varInAnotherBlock = 'valueInAnotherBlock';

GOOD

let var1,
    var10  = 'first10',
    var100 = 'first100',

    varInAnotherBlock = 'valueInAnotherBlock';

var1   = 'value1';
var10  = 'value10';
var100 = 'value100';

varInAnotherBlock = 'valueInAnotherBlock';

[jlongster]

Not going to do this, sorry. It would require a lot more complexity, and I think this style fails in some cases where you have a really long variable name and it doesn’t make sense to push everything over. This is an arbitrary style and we’re going to stick with a consistent var variable = value.

It technically would be very hard, just to expand. What do you do when a comment separates a group of variables? We interleave the comments after printing the nodes, so we have no knowledge of where comments are places while printing variables.

[Matt-Hill-Harness]

I think it would be relatively easy to allow users to plug in an existing alignment tool. All IDEs support them.