Started Tests and refactoring of sequential training in engine

.coverage

.coverage.DESKTOP-ATMEKSV.32068.XwAmxjsx

Outputs_SeqPosteriorComparison/posterior/Z.npy

examples/analytical-function/test_analytical_function.py

src/bayesvalidrox/__init__.py

src/bayesvalidrox/bayes_inference/mcmc.py

src/bayesvalidrox/post_processing/post_processing.py

src/bayesvalidrox/surrogate_models/bayes_linear.py

src/bayesvalidrox/surrogate_models/engine.py

src/bayesvalidrox/surrogate_models/exp_designs.py

src/bayesvalidrox/surrogate_models/exploration.py

src/bayesvalidrox/surrogate_models/input_space.py

src/bayesvalidrox/surrogate_models/meta_model_engine.py

...svalidrox/surrogate_models/orthogonal_matching_pursuit.py

src/bayesvalidrox/surrogate_models/reg_fast_laplace.py

src/bayesvalidrox/surrogate_models/surrogate_models.py

tests/test_ExpDesign.py

tests/test_InputSpace.py

tests/test_MetaModel.py

tests/test_engine.py