Bnlearn

* fix for recursive model check

* Removed lowering of pathname in the `import_DAG` function.
* Added new scoring method: `BDS `and `AIC`
* Created groupby functionality for inferences that allows grouping similar categories.
* Auto-convert non-numerical columns into numerical when discretizing

* Code refactoring
* Small improvements docstrings

I am really happy to announce the following new great functionalities in bnlearn!

* Continuous data modeling is possible using the approach of Yi-Chun Chen et al.
* Interactive plots are created using `D3Blocks `which provides more flexibility.
* Data examples and functions are removed from `bnlearn ` and are now imported from `datazets` library.
* Unit tests updated and new ones implemented

Especially for the `plot` functionality, some of the input parameters are changed.
See the [docs](https://erdogant.github.io/bnlearn/pages/html/Continuous%20Data.html) for continuous data modeling

* fix for disabling verbose message

* Freeze pandas package to 1.5.3 because of error in iteritems that is used in underlying pgmpy package.
* A huge new implementation with new functionalities but this needs to be documented first.

* added library requests