[CONFIDENCE INTERVAL] in the non stationary case, only the normal method is defined. in the stationary, i managed to add test the "boot" method. But for the "proflik" method there was a crash in R related to the spline, that i did not resolve

[CONFIDENCE INTERVAL] add confidence interval test for the normal (i.e. delta) confidence interval method

[CONFIDENCE INTERVAL] check that ci code return the same interval and mean posterior for the return level as my code with coordinates from 0 to 49. and also with transformed coordinates

[EXTREME ESTIMATOR] add test confidence interval. Add confidence interval with the ci method in the Bayesian case. add test for the stationary case. put the division by 100 (to get snow load) in eurocode vizualizer