Feature request - Add "style" to render properties

[NeilMacMullen]

The render operator is currently limited in the amount of information that it can pass to the rendering client. Clients such as my project kusto-loco may have considerable flexibility in the presentation of the visual and it's currently not possible to express this in the render statement.

I suggest adding a property called "style" that can be sent to any arbitrary text value. The user could then set this property to influence the client's rendering.