Include (Visual) Examples in Style Spec Documentation

[louwers]

I think it would be quite very helpful to include some (visual) examples of how individual expressions and layer properties can be used. What do you think @HarelM ?

[HarelM]

I generally agree, the main question is how?
We can probably use the markdown syntax for images right in the v8.json file to do this - ![alt](link to image).
The current solution is mainly to link to maplibre-gl-js example pages, but you are welcome to change/improve on that.

[louwers]

OK I will think about it some more. I think we need MapLibre GL JS to show things like zoom based interpolation.