PValueResult is not exported #233

The DefaultPValue op returns a PValueResult object, which is a struct consisting of Double pValue, Double colocValue, double[] colocValuesArray. The class has no fancy logic, it's just a data container. Unfortunately, the PValueResult class is part of scijava-ops-image, which does not export any packages, so callers cannot actually consume this output to see the results of their coloc.pValue Op executions.

To fix this, we could introduce a very general Triple<A, B, C> interface to scijava-common3 and have scijava-ops-image's DefaultPValue op return Triple<Double, Double, double[]> instead of a PValueResult. More type-safe would be a public record PValueResult (Double pValue, Double colocValue, double[] colocValuesArray), but it would still need to live in an exported package... somewhere...