Change Mover.Payload to a structure

[netbymatt]

Since our intended use for Mover.Payload is to carry data specific about the part on this mover, let's change this to something more useful than a single DINT.

If I were to store some typical data with this mover it might include: serialNumber, recipeId, failureReason which would need to be in a structure.

Changing Mover.Payload to a structure is doable if you follow all the errors, but a significant process that touches: iMover, ErrorMover, Mover and requires creating the structure.

To make Payload more useful, let's pre-create the structure and put it outside of XTS (Do Not Edit) so it's something more visible. By making the new structure have some common example elements like above it also makes the use case much easier to document.