display spec explain when constructs/fns args don't conform

[stevebuik]

Currently the response only says that it doesn't conform.

It could mention the specific spec that was used in the conform check and the explain data as well. Tyler mentioned using Expound for this, this would be even better but not sure if you want to add a new concrete dep. I wonder if Expound could be optional? Personally I'm ok with the extra dep.

This kind of feedback would reduce the difference between clj-cdk and just using TypeScript with CDK i.e. less temptation to stay in the .ts world.