Add a stub for Criteria

[fluffycondor]

No description provided.

[fluffycondor]

Huh, I'm confused by this:
Cannot call a non-mutation-free method Doctrine\Common\Collections\Criteria::orderBy from a pure context
I've marked this method as @psalm-external-mutation-free because it mutates its own state only. The object is created inside the pure function and never will be user outside of it. Shouldn't @psalm-external-mutation-free be sufficient here? I don't understand how to fix it.

[AndrolGenhald]

Sounds like vimeo/psalm#5615 to me, I'd just suppress it for now.

Edit: Wait, looks like this is going to happen for callers? Well, that's not so good. Maybe we really need to fix that in Psalm.