Support Pillow >=10.0.0,<13.0.0 for Python 3.14 compatibility

[Copilot]

Pillow 10.x is unavailable for Python 3.14, blocking support for newer Python versions. The constraint was unnecessarily tight.

Changes

• pyproject.toml: Relaxed Pillow constraint from <11.0.0 to <13.0.0
• dev-spec.txt: Matched constraint to <13.0.0
• ci/recipe/meta.yaml: Matched constraint to <13.0.0

Testing

Verified Image.LANCZOS resizing in mpas_analysis/shared/html/image_xml.py (the only Pillow usage) works identically across versions 10.4.0, 11.3.0, and 12.0.0.

Checklist

• User's Guide has been updated
• Developer's Guide has been updated
• Documentation has been built locally and changes look as expected
• Testing comment in the PR documents testing used to verify the changes

Closes #1071

Original prompt

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This section details on the original issue you should resolve

<issue_title>Support "pillow >=10.0.0,<13.0.0"</issue_title>
<issue_description>We are currently restricting pillow to a version that is not available for python 3.14. The restriction seems unnecessarily tight. We should look at where we are using pillow and what code changes are needed to support versions 11.x and 12.x. We should relax the constraint if at all possible.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Support "pillow >=10.0.0,<13.0.0" #1123

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[xylar]

@copilot, please also update:
https://github.com/MPAS-Dev/MPAS-Analysis/blob/develop/ci/recipe/meta.yaml#L43

[Copilot]

@copilot, please also update:
https://github.com/MPAS-Dev/MPAS-Analysis/blob/develop/ci/recipe/meta.yaml#L43

Updated in 656a3f8. All three files (pyproject.toml, dev-spec.txt, and ci/recipe/meta.yaml) now consistently specify pillow >=10.0.0,<13.0.0.

[xylar]

I will run the test suite with this before I merge.

[xylar]

Testing

I ran the test suite on Chrysalis and all websites were produced as expected:
https://web.lcrc.anl.gov/public/e3sm/diagnostic_output/xasaydavis/analysis_testing/chrysalis/copilot/support-pillow-versions-11-12/