* added dash app instead of ipywidgets
* added pre-commit
* removed ipywidgets function
* added dash to dependencies
* exempted dash server from tests
* put das explorer app in new class
* added variable for img path in tests
* added new explorer class to all notebooks
* added identif class variable
* removed unused argument in test_display
* more cleanup, more text analysis in notebook
* update NER test
* update with more comments and fix dash calls
* update text description multimodal
* update objects description
---------
Co-authored-by: Inga Ulusoy <inga.ulusoy@uni-heidelberg.de>
