[FEAT] Add linting to apps which prevents imports from "libs".

[damienwebdev]

:bulb: Feature request

Feature Name

Lib Linting

The Desired Behavior

The demo app should never be allowed to import from "libs", and it should error if it does.

Your Use Case

See #285

Environment

Daffodil version: X.Y.Z
Angular version: X.Y.Z 

 
For Tooling issues:
- Node version: XX  
- Platform:  

Others: