Add pillow to pyproject.toml dependencies

[Copilot]

Multiple core modules import PIL but pillow wasn't declared as a dependency, causing import failures for fresh installs.

Changes

• Added pillow to the dependencies list in pyproject.toml

Affected modules

• tinker_cookbook/image_processing_utils.py
• tinker_cookbook/renderers.py
• tinker_cookbook/recipes/vlm_classifier/data.py
• tinker_cookbook/recipes/vlm_classifier/eval.py

Original prompt

Do we need to add pillow to pyproject in tinker-cookbook after the PR I landed? if so let's do it

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[github-actions]

Claude finished @Copilot's task in 36s —— View job

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Review Complete

• Analyze the PR changes
• Review the pyproject.toml modification
• Verify affected modules actually import PIL
• Provide review feedback

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LGTM! ✅

This is a correct and necessary fix. The PR adds pillow to the dependencies list in pyproject.toml, which is required because 4 modules in the codebase import from PIL:

File	Import
tinker_cookbook/renderers.py:13	from PIL import Image
tinker_cookbook/image_processing_utils.py:13	from PIL import Image
tinker_cookbook/recipes/vlm_classifier/data.py:16	from PIL import Image
tinker_cookbook/recipes/vlm_classifier/eval.py:4	from PIL import Image

The placement is correct (alphabetically sorted in the dependencies list), and this will fix import failures for fresh installs that don't have pillow installed through other means.