[DOC] Adding a Notebook companion to BayesianMCMCLinearRegressor, Restructuring Estimator Folder

[meraldoantonio]

Reference Issues/PRs

Notebook example for BayesianMCMCLinearRegressor estimator; (#358) (merged)
Some renaming/restructuring of folders for both the estimator and the example notebook.

What does this implement/fix? Explain your changes.

Provides step by step explanation on how to use BayesianMCMCLinearRegressor, accompanied by high level overview of Bayesian workflow.

Does your contribution introduce a new dependency? If yes, which one?

No

What should a reviewer concentrate their feedback on?

The usefulness and correctness of the notebook.

Did you add any tests for the change?

No

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[meraldoantonio]

Hi @fkiraly,

I will close this PR since the example notebook is now outdated (the updated one is in #520), and the estimator reorganization has already been addressed in the recently merged PR (#515).

Thank you!