[docs] Started update to PCE/GPE classes

...ox.post_processing.post_processing.PostProcessing.doctree

...mmary/bayesvalidrox.surrogate_models.bayes_linear.doctree

...trees/_autosummary/bayesvalidrox.surrogate_models.doctree

...mary/bayesvalidrox.surrogate_models.engine.Engine.doctree

...autosummary/bayesvalidrox.surrogate_models.engine.doctree

...lidrox.surrogate_models.engine.hellinger_distance.doctree

...mary/bayesvalidrox.surrogate_models.engine.logpdf.doctree

...y/bayesvalidrox.surrogate_models.engine.subdomain.doctree

...alidrox.surrogate_models.exp_designs.check_ranges.doctree

...ummary/bayesvalidrox.surrogate_models.exp_designs.doctree

....surrogate_models.gaussian_process_sklearn.GPESkl.doctree

...urrogate_models.gaussian_process_sklearn.MySklGPE.doctree

...alidrox.surrogate_models.gaussian_process_sklearn.doctree

...svalidrox.surrogate_models.input_space.InputSpace.doctree

...ummary/bayesvalidrox.surrogate_models.input_space.doctree

...yesvalidrox.surrogate_models.polynomial_chaos.PCE.doctree

...y/bayesvalidrox.surrogate_models.polynomial_chaos.doctree

...ate_models.reg_fast_laplace.RegressionFastLaplace.doctree

...rrogate_models.sequential_design.SequentialDesign.doctree

.../bayesvalidrox.surrogate_models.sequential_design.doctree