Extract jupyter language to ``intellij.jupyter.core``.
It now has ``jupyter-core.xml`` with language only and ``jupyter-core-view-only.xml`` to be included in community versions.
It also provides framework to show jupyter using web applications
GitOrigin-RevId: fa80df820adab872768dc28ce567c7a86a2b552d
* PyDocstring: "pycon", "python-repl"
* Python: "py", "python3"
I've added the links to the documents describing popular references to `PyCodeFenceLanguageProvider`.
GitOrigin-RevId: 6cafb15c9655434f5d69aa47eb7472b634364377