This was becoming heavy to manage.

Otherwise, when editing a file with VE, we would constantly write
to disk, which is a bit inefficient.

This is the first commit I do entirely in VE. It's a habit I'm planning
on taking as it helps a lot to find usability issues.

and renamed it "Core words". Also, reworded the presentation.

TODO: implement X['] so that I can remove those XCURRENT patterns.

With all this recent movements, we had a bit of a fragmentation
issue.