feat: extract calcipy-flake8

[KyleKing]

• Switch calcipy to ruff and remove dependencies for flake8, unimport, etc.
• Create a sub-package of flake8 packages not currently supported by ruff and publish. Use only with the flake8 pre-commit hook

└── calcipy-flake8
    ├── pyproject.toml
    └── calcipy_flake8