test image description is not rejected due to violence

[austinworks]

add initial image test fixture

[Copilot]

Pull Request Overview

This PR introduces an initial image test fixture for the graphic image example to ensure that image descriptions are generated correctly without being rejected due to violent content.

• Added tests for describing images via URL and local file paths in the graphic image example.
• Updated the configuration in conftest and the GitHub workflow to support the new test fixtures and proper environment variable checks.
• Revised the README to include setup and testing instructions specific to the graphic image example.

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated no comments.

File	Description
examples/graphic_image/tests/test_describe_image.py	Adds test functions and helper methods for image description.
examples/graphic_image/conftest.py	Provides environment setup and modifies sys.path for tests.
examples/graphic_image/readme.md	Documents local setup, dependency installation, and testing.
.github/workflows/cat-test-examples.yml	Updates workflow steps and exit codes to verify environment vars.

Files not reviewed (1)

• examples/graphic_image/.env.example: Language not supported

Comments suppressed due to low confidence (1)

examples/graphic_image/tests/test_describe_image.py:62

• [nitpick] Consider adding additional assertions to verify that 'description' is not only non-null but also non-empty, which would improve test coverage and robustness.

assert description is not None

[paulz]

some people think that this may not be an appropriate image