Explicitly reject or ignore invalid render! -> place! keywords

Brought up in #268, related to #7 --- `render!` forwards keyword arguments to `place!`, which doesn't take keyword arguments. This throws an error like `MethodError: place!(::CoordinateSystem, ::CurvilinearRegion, ::SemanticMeta) got unsupported keyword argument "atol"`. We need to decide whether or not this is the correct behavior. If it is, we should throw a clearer error in that `render!` method.

The main alternative is just to drop the keyword arguments and continue, either silently or with a warning. One could imagine an `AbstractCoordinateSystem`-subtype-agnostic function that calls `render!` and uses keywords for the `Cell` case but not otherwise, like `round_layer!`, but it's hard to back out a case where the user is actually calling such a function on an unknown mix of CoordinateSystems and Cells. So I lean towards throwing an error.

Start by tracing the render! method that forwards keyword arguments to place!, then compare the behavior for CoordinateSystems and Cells with the round_layer! use case described here. Decide whether invalid keywords should be rejected or ignored, and consider the issue complete when the chosen behavior is explicit and covered by a regression test.

Written by the indexing model from the issue text.