Sequential design now considers both exploitation and exploration samples

src/bayesvalidrox/bayes_inference/bayes_inference.py

src/bayesvalidrox/bayes_inference/mcmc.py

src/bayesvalidrox/post_processing/post_processing.py

src/bayesvalidrox/pylink/pylink.py

src/bayesvalidrox/surrogate_models/bayes_linear.py

src/bayesvalidrox/surrogate_models/meta_model_engine.py

src/bayesvalidrox/surrogate_models/reg_fast_ard.py

src/bayesvalidrox/surrogate_models/reg_fast_laplace.py

src/bayesvalidrox/surrogate_models/sequential_design.py

src/bayesvalidrox/surrogate_models/surrogate_models.py