CDK: check SCP (service control policies) as you type

[justinmk3]

Problem

Developers can author CDK code that isn't deployable.

1. SCP Intellisense.
2. Pull down tests from a Construct hub

We don't want to be in a situation where we write a stack and cannot deploy it because of Company SCPs so intellisense would be for the win here. We also need to have Globally defined Stack tests so that we cannot push code to CodeCommit which won't be able to be deployed even if a dev ignores the intellisense.

We want speed and we want to intercept non-compliant code as the dev types.

Originally posted by @sholtomaud in #751 (comment)

Solution

Can AWS Toolkit check code while it's being edited, to ensure that it compiles with SCP and is deployable?