This pull request introduces several improvements to developer tooling, test coverage, and code quality for the project.
The most significant changes include a comprehensive overhaul of the pyproject.toml configuration, enhancements to pre-commit hooks, improvements to coverage and testing configuration, and the addition of thorough tests for custom Qt spinbox widgets. There are also minor code style and coverage annotation adjustments.

Configuration and Tooling Improvements:

• Major rewrite and reorganization of pyproject.toml:
  • Clarifies dependencies and optional dependencies.
  • Updates project metadata, classifiers, and URLs.
  • Consolidates and modernizes test, coverage, and packaging configuration.
  • Adds and configures tools like Ruff, pyproject-fmt, and updates pytest settings. [1] [2]
• Updates .pre-commit-config.yaml:
  • Upgrades pre-commit hooks to newer versions.
  • Adds hooks for TOML checking, formatting, and pyproject validation.
  • Updates Ruff to a newer version.
• Simplifies .coveragerc by removing specific file omissions, deferring omission to tool configuration.

Testing Enhancements:

• Adds comprehensive tests for ScrubSpinBox and ScrubDoubleSpinBox custom widgets, including mouse event simulation and modifier behavior, greatly improving test coverage and reliability for these components. [1] [2] [3]

Coverage and Code Quality:

• Refactors coverage annotations (pragma: no cover) in dlclivegui/processors/dlc_processor_socket.py for clarity and to ensure accurate coverage reporting. [1] [2] [3] [4]

These changes collectively modernize the project's configuration, improve code quality, and ensure more robust and maintainable testing practices.