Create a DraggableDialog component in Carbon Labs

[jlongshore]

This will be a component which will allow the positioning of a closable panel which is draggable by mouse / keyboard interactions. Only the heading of the dialog will be opinionated, allowing the contents to be up to the developer.

note: This component extends the "HTMLDialogElement" interface and it's root element will be a <dialog... html element.

Will take a few props:

1. closeIconDescription: (optional) string - value to be used as the aria label of the Close icon button.
2. open: boolean - Controls if the component is to be shown.
3. className: string - applied to the outer most element in the component.
4. onClose: function - to be called when the close icon button is clicked.

[jlongshore]

Punting this to the next sprint - I have it functional, needs styling work and I don't know if I will get to it in sprint 4