Debug info in SolidModel rendering

It would be nice to have a debug/verbosity flag that makes `render!(::SolidModel...)` print information like the debugging snippets [here](https://aws-cqc.github.io/DeviceLayout.jl/dev/how_to/faq/#SolidModel-rendering-is-failing.-How-do-I-debug-it?) so we don't have to recommend users step through postrendering manually -- operations, result entity counts and bounds, and timings seem most relevant, but we can consider what else might be useful.

Start with the `render!(::SolidModel...)` entry point and compare its behavior with the debugging snippets in the linked FAQ. Define how a debug or verbosity flag should report operations, result entity counts and bounds, and timings; done means users can obtain these diagnostics without manually stepping through postrendering.

Written by the indexing model from the issue text.