Make decorator to support timelapse processing of napari data types

[jo-mueller]

I'm creating this issue to keep track on development of a decorator for timelapse processing of napari data types, including napari.types.PointsData and SurfaceData. This has been mentioned here, maybe this project can serve as a good incubator to bring this forward to be used on a larger scale.

The current approach is contained in PR #10 and it does:

• check the type annotations for all input arguments
• converts the input data from 4D to a list of 3D objects
• executes the decorated function on all timeframes
• puts the return value back to together depending on the decorated function's return type annotation.

The decorator lives here

Now - what would be a good way to separate, for instance, the following cases:

• Points Data [2D + T] vs. Points Data [3D] - they would have identical array dimensions.
• Surfaces are inherently 3D, but how could we differentiate between a 3D/4D surface in a "good" way?

Comments are welcome!
@zoccoler @haesleinhuepf tagging you here for discussion