Add max_size restriction for custom schemas [FEATURE]

[quincylvania]

We're using min_size over at OpenTrailMap to progressively show POIs for notable parks at the given zoom level. This works great when the park is contained in the viewport (example at z4):

However, once we get zoomed in far enough it doesn't make sense to show a central point marker anymore (example at z18):

We could probably filter these out in MapLibre but the more efficient solution would be to exclude them from the tiles with a parameter like max_size.

[msbarry]

Interesting, this isn't a capability in the java API either - profiles just set a max zoom. So you would set max size to some number of "square pixels" or "square tiles"?

[quincylvania]

@msbarry The unit should probably match that of min_size, which I guess is pixels. Personally I find this unit a bit difficult to visualize and prefer a ratio more akin to that of min_tile_cover_size.

[quincylvania]

I'm realizing this is less useful than expected since we only render tiles up to z14.