Grid Public Api

[ruslic19]

Bug Report

What is the expected behavior?

Expected behaviour is for grid directives to be exposed from public api of library

What is the current behavior?

Grid directives are not exposed from public api of library

What are the steps to reproduce?

StackBlitz

What is the use-case or motivation for changing an existing behavior?

When I tried to use custom breakpoints with grid directives, I revealed a bug with imports, I couldn't import directives because they are not exposed from public api of library. So I added needed imports in this PR.

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}