Use uppercase enum values for PEP compliance

[sethrj]

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[Copilot]

Pull Request Overview

This PR updates enum values to use uppercase naming convention for PEP compliance, migrating from snake_case to UPPER_CASE enum members while maintaining backward compatibility through deprecated lowercase aliases.

• Updates all enum definitions to use StrEnum and auto() for consistent uppercase values
• Maintains backward compatibility by providing lowercase aliases for existing enum members
• Updates test files and configuration to use the new uppercase enum values

Reviewed Changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
celerpy/model.py	Converts enums to StrEnum with uppercase values and backward compatibility aliases
celerpy/conf/settings.py	Imports LogLevel from model.py and updates default values to uppercase
celerpy/visualize.py	Updates enum references to use uppercase values and adds visualization improvements
test/test_visualize.py	Updates test code to use uppercase enum values
test/test_model.py	Adds test to verify backward compatibility of lowercase enum values
pyproject.toml	Removes numpy mypy plugin
requirements-dev.txt	Updates development dependencies to newer versions

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