feature discussion: Add resolution (detection) to output

[SteveClement]

To document: The first layer will define the output resolution at the moment.
To implement: Warn if resolutions of asset are different, display output resolution.

It does give for an interesting cropped output:

But I would like to add the following parameters:

RESOLUTION_AUTO=True # process the first image, detect resolution and proceed with that resolution
RESOLUTION_OUT="600x600" # This only applies if RESOLUTION_AUTO=False

What would be the consensus on where to put this tunable?
Into the config list or into each and every dictionary item, feels superfluous and inefficient.