Added tests for HuygensPSF

[LucVV]

Proposed change

I added tests for the HuygensPSF analysis.

Type of change

• Example (a notebook demonstrating how to use ZOSPy for a specific application)
• Bugfix (non-breaking change which fixes an issue)
• New analysis (a wrapper around an OpticStudio analysis)
• New feature (other than an analysis)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests
• Documentation (improvement of either the docstrings or the documentation website)

Additional information

• Python version: 3.11
• OpticStudio version: 20.3.2

Related issues

#133

Checklist

• I have followed the contribution guidelines
• The code has been linted, formatted and tested locally using hatch.
• Local tests pass. Please fix any problems before opening a PR. If this is not possible, specify what doesn't work and why you can't fix it. --> the reference data is still to be generated
• I added new tests for any features contributed, or updated existing tests.
• I updated CHANGELOG.md with my changes (except for refactorings and changes in the documentation).

If you contributed an example:

• I contributed my example as a Jupyter notebook.

[crnh]

Thanks for noticing and fixing this! I added test reference data. All tests pass on my system.