Consolidate config into pyproject.toml file

[copelco]

Summary

As a developer, I want to consolidate configuration settings (.coveragerc, pytest.ini, etc.) into the pyproject.toml file so that project configuration is centralized and easier to manage.

Todo

• Migrate .coveragerc settings to pyproject.toml
• Migrate pytest.ini settings to pyproject.toml
• Migrate setupt.cfg settings to pyproject.toml

AC

• All relevant configuration settings are moved to pyproject.toml