Include functionality to add table buttons

[happymacarts]

Adds ability for users to include table buttons on the model Fixes #46
more info about buttons options can be found here https://datatables.net/reference/button/

[wimurk]

When you add the buttons, you can't use the translator. Moving it to a method would be better.

public function buttons() : array
{
    return [];
}

[happymacarts]

I have been trying to get this to work but am missing something (I am sure simple)

[wimurk]

@happymacarts you can add new methods in the abstract class Field in the SingleQuote\DataTables\Controllers location.