[Feature] Field documentation shows when suggesting completion

[ViTeXFTW]

Problem

I can be difficult to know what each of the fields do when writing code especially when adding behavior modules to an object.

Proposal

The schema.json file could contain documentation meta data which is used to display helping text in the completion window.

Examples

Apart from only showing the value type of the field, it could give additional information about the field itself, and what it does.

[ViTeXFTW]

This could be expanded to also show text when doing hovering over a field or value.