WIP: Jupyter Notebook Storage
This merge request will add a portal type Web JSON to the Web Page Module . It will be used to store Jupyter Notebooks within ERP5 as a plain JSON string with attached meta-data such as title and reference as well as the usual ERP5 metadata.
Additionally, *_notebookJioView views are added for Web JSON and Web Page Module, to allow interaction with JIO.
Currently no tests were done (I still do not have rights to start test suites).