[SCM][HYPERCUBE] Create Hypercube object with MultiIndex. Modify @cached_property in utils (from a library and seems to a bit faster). added some parallelization for trend test type in study_visualizer.

[SCM][NON STATIONARY TREND] modify some display parameter. add pre loaded LATITUDE & LONGITUDE to scm_constants file. remove massif file.

[EXTREME ESTIMATOR] add max iteration argument for any R fit. also add some verbose for trend tests experiments.

[COORDINATES] add some normalization class for the coordinate, add a normalization function for the observations.

[COORDINATES] add one test to test_transformation. add some copying during coordinate transformation.

[MAX STABLE] add starting point for non stationary full estimator. fix display in non stationary trends

[DATASET] add creation of spatio temporal dataset from simulation. add test for non stationarity of max stable

[TEST][DATASET] major fix for abstract_dataset for the function transform_maxima in the spatio temporal case