Generated fields type resolution

[Mapiarz]

I added support for field type resolution for Django 5 GeneratedFields. For a generated field, the output_field is mandatory, and this is what I'm using to determine the strawberry field type.

Extended existing test about field type resolution that is backwards compatible with Django <5. Did not modify the project dependencies.

Summary by Sourcery

This pull request introduces support for resolving field types for Django 5 GeneratedFields by utilizing the output_field attribute. It also extends existing tests to cover this new functionality while maintaining compatibility with earlier Django versions.

• New Features:
  • Added support for resolving field types for Django 5 GeneratedFields using the output_field attribute.
• Enhancements:
  • Extended existing tests to include field type resolution for GeneratedFields, ensuring backwards compatibility with Django versions prior to 5.

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This pull request adds support for field type resolution for Django 5 GeneratedFields. The changes include importing GeneratedField, updating type resolution logic to use model_field.output_field, and extending tests to ensure backward compatibility with Django versions prior to 5.

File-Level Changes

Files	Changes
strawberry_django/fields/base.py strawberry_django/fields/types.py	Added support for Django 5 GeneratedField by importing it and updating type resolution logic to use model_field.output_field.

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