NOISSUE: Add a helper class to create GridData layouts.

[tassadarius]

Add a convenience builder for GridData

From the commit message:

This newly added class works basically like a builder and helps in creating GridData objects which need properties such as widthHint, minimumWidth, or verticalIndent set.

Before you would had to create an own variable like so:

GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
gd.verticalIndent = 100;
gd.heightHint = 60;
myLabel.setLayoutData(gd);

But now it doesn't require a variable and looks IMHO nicer:

myLabel.setLayoutData(GridDataBuilder.with(SWT.FILL, SWT.FILL, true, true)
        .verticalIndent(100).heightHint(60).get());

[grthor]

Looks nice 👍🏻 Like the unit service, really well documented.