[feature] : Ferret ratio metric

[MaxGamill-Sheffield]

Is your feature request related to a problem?

The current aspect ratio considers the cartesian bounding box of the grain, whereas a better descriptor might be the ratio of the min and max ferret diameters.

Describe the solution you would like.

Another metric calculating the min_ferret / max_ferret as a measure of compaction.

Describe the alternatives you have considered.

No response

Additional context

No response

[ns-rse]

Could this be considered a duplicate of #860?

Both seem to be converging on the same solution so we could perhaps close #860 and address this one at some point in the future.

Off the top of my head min_feret and max_feret are already calculated as part of the summary statistics so the ratio is incredibly simple to calculate (a simple division).

NB - I could be wrong and this issue may be about 😉