simplify pre-commit and jupytext settings (pymc-devs#483)

* modify pre-commit and jupytext

* ignore myst files when building docs

allow retrieving doi code from rtd (pymc-devs#269)

* allow retrieving doi code from rtd

* update page_footer

* rename env var to something allowed

Update VI Bayesian NN notebook to best practices (pymc-devs#221)

* best practices updates

* updates: coords naming

* fix coords

* style guide changes

* rerun precommit

* fixes

* author names in ref

* run with arviz v0.11.4

* fix links

* fix broken ADVI link

Update VI Bayesian NN notebook to best practices (pymc-devs#221)

* best practices updates

* updates: coords naming

* fix coords

* style guide changes

* rerun precommit

* fixes

* author names in ref

* run with arviz v0.11.4

* fix links

* fix broken ADVI link