Ability to mark all APIs in submodules deprecated

[kaizencc]

:rocket: Feature Request

Description

There's currently a way to deprecate specific APIs in a module, using the @deprecated tag. However, entire submodules need a quick and easy way to be completely deprecated. This is a problem in aws-cdk (see elasticsearch deprecation).

Proposed Solution

We probably need a deprecated flag in jsiirc.json that will mark all APIs in that particular submodule as deprecated. Tentatively agreeing to take this on the next time aws-cdk has a submodule that needs deprecation.