Make method annotations more strict

[Harfusha]

#1002

[dereuromark]

The original issue reported was

> newEntity() parameter #1 $data with no value type specified in iterable type array.

None of the concrete entity changes is addressing it.
The opposite: this is usually rather creating more problems for App level.

Can we just fix the mixed in iterable instead?

[dereuromark]

I would expect

iterable<EntityInterface>

For input args (param) annotation

And concrete entity for output (return) annotation

[Harfusha]

Oh, so you want to implement the concete entities in IdeHelper?
Going to fix the issues.

[dereuromark]

Looks good

It turns out most IDEs are not yet understanding this new syntax. Maybe this should rather be an opt-in feature flag for IdeHelper?