Docs for Chinese word segmentation

[adrianeboyd]

Description

Docs for Chinese word segmentation

Types of change

Docs.

Checklist

• I have submitted the spaCy Contributor Agreement.
• I ran the tests, and all new and existing tests passed.
• My changes don't require a change to the documentation, or if they do, I've added all required information.

[adrianeboyd]

The formatting of the sub-sub-sub-sections may not the best option?

[ines]

I'll have a look at it in the browser and see if we can maybe tighten it up a bit! We also have the option to use an "accordion" (like here) and only show certain information on click, like maybe the pkuseg specifics.