Feat: check injectable decorator

[Mnigos]

Description

This role will have two use cases: warning if unnecessary @Injectable decorator was applied, and another warning if something is injecting into the class, but @Injectable decorator was not applied.

Acceptance Criteria

I think I covered everything in description.

[Mnigos]

Another useful features request related with dependency injection is that in @typescript-eslint/consistent-type-imports import type when imported class is using for dependency injection and causes errors.