Add registration-related ops

[imagejan]

It would be great to have all steps required for descriptor-based registration available as ops:

• filter.differenceOfGaussian (exists, but with its acronym that might not be obvious for newbies: filter.dog) and filter.laplacianOfGaussian

• localExtrema(List<RefinedPeak<P>> out, RandomAccessibleInterval<T> in, T threshold?) (with optional sub-pixel localization)

• descriptorMatching(InvertibleRealTransform out, List<RefinedPeak<P>> in1, List<RefinedPeak<P>> in2) or similar

• realTransform(RandomAccessibleInterval<T> in, InvertibleRealTransform transform) like implemented in Real transform #533