Used imports are marked as unused

[mspirkov]

Describe the bug

Used imports are marked as unused. This happens when a class is imported only to import a PHPStan type from it.

To Reproduce

1. Create 2 classes with different namespaces.
2. Add a PHPStan type to one class.
3. Import the PHPStan type in the other class.

Expected behavior

The import is marked as used.

Screenshots

Platform and version

OS: Windows 10
Intelephense version: 1.16.2

[mspirkov]

I reproduced the same problem with the @see tags.