* Allow specification of dims instead of shape

* Add pm.TidyData

* Create coords for pm.Data(ndarray)

* empty commit to trigger CI

* Apply suggestions from code review

Co-authored-by: Alexandre ANDORRA <andorra.alexandre@gmail.com>

* apply black formatting

* address review comments & formatting

* Add demonstration of named coordinates/dims

* don't require dim names to be identifiers

* sort imports

* raise ShapeError instead of ValueError

* formatting

* robustify Dtype and ShapeError

* Removed TidyData and refined dims and coords implementation

* Changed name of kwarg export_dims and improved docstrings

* Add link to ArviZ in docstrings

* Removed TidyData from __all__

* Polished Data container NB

* Fixed line break in data.py

* Fix inference of coords for dataframes

* Refined Data container NB

* Updated getting started NB with new dims and coords features

* Reran getting started NB

* Blackified NBs

* rerun with ArviZ branch

* use np.shape to be compatible with tuples/lists

* add tests for named coordinate handling

* Extended tests for data container

Co-authored-by: Michael Osthege <m.osthege@fz-juelich.de>
Co-authored-by: Michael Osthege <michael.osthege@outlook.com>
Co-authored-by: Alexandre ANDORRA <andorra.alexandre@gmail.com>