[paper 1] add error bars to uncertainty plot. add time series of maxima curve plot for 600m increasing case. add colorbar when necesasry for the trend plot.

[paper 1] refactor study visualizer using "model subset for uncertainty" name instead of unclear names.

[PAPER 1] add gumbel type for mle fit. add study_visualizer_for_shape_repartition both for gumbel VS stationary and stationary VS non-stationary

[PAPER 1] refactor folder names in the paper snow load folder. add mani gelman convergence test. add the possibility to change the number of iterations for the bayesian fevd estimation