Make Jupynium compatible with non-jupynium (`*.ju.*`) files

[vandalt]

Make Jupynium compatible with non-jupynium (`*.ju.*`) files

[kiyoon]

Sure! The current file_pattern configures auto-starting server and syncing. This would almost likely be a personal choice and should be configured by users. On the other hand, highlighting and textobjects can be grouped into one file_pattern configuration because the goal is the same: making other files detected as a jupynium file.

Correct wording would be important here so it's clear what each pattern means. I don't think there needs a global pattern and overrides for commands. I think the auto-starting commands should just have their separate file_pattern, and we just need to be clear what the main pattern does.

We can name this jupynium_file_pattern and say it adds necessary vim commands (:JupyniumStartAndAttachToServer etc.), highlighting and keybindings etc.
We can make two defaults for now (jupynium_file_pattern = { "*.ju.*", "*.sync.py" }) because Jupyter Ascending users may have a lot of sync.py files.

[kiyoon]

I just implemented this. Check it out.

[vandalt]

This works on my end! Adding ".ipynb" even makes it compatible with files automatically converted by jupytext.vim. Thank you!

[kiyoon]

Great it works like that! I hope to implement auto-converting soon, nonetheless.