Option to control `implements` formatting for classes

[ylacaute]

It would be great to support an option to control how implements clauses are formatted when breaking to multiple lines.

I would like to have:

export class MyClass<T extends Something>
  implements
    InterfaceA,
    InterfaceB,
    InterfaceC,
    InterfaceD

Instead of (depending line width) :

export class MyClass<T extends Something>
  implements InterfaceA, InterfaceB, InterfaceC,
    InterfaceD