[bayes_nonconj] Update lecture (#545)

* remove pyro

* fix typos

* remove unused import

* fix code formatting

* fix doc reference

* fix legend warning

* modify style

- Adopt QuantEcon naming format
- Adopt one-line docstring format in accordance with PEP 8
- Change integral notation from $\int dx\, f(x)$ to $\int f(x)\, dx$
- Reorder the illustration of (`param`, `name_dist`) pairs

* test setting figure by cell metadata

* modify figure style

* reorder of comment and metadata cell

* fix figure tag and caption

* convert to jax-based pattern

* fix comment

* recover to test compiling

* fix comment

* fix typo

* fix building error

* modify styling

* delete dataclasses import

* modify styling

* retry building

* Update lectures/bayes_nonconj.md

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Co-authored-by: xuanguang-li <edwardli02123@gmail.com>
Co-authored-by: Matt McKay <mmcky@users.noreply.github.com>

Author: 3 people