pyproject: switch to ruff and fix issues

pymbolic/algorithm.py

pymbolic/geometric_algebra/__init__.py

pymbolic/geometric_algebra/mapper.py

pymbolic/imperative/utils.py

pymbolic/interop/ast.py

pymbolic/mapper/evaluator.py

pymbolic/mapper/optimize.py

pymbolic/mapper/stringifier.py

pymbolic/maxima.py

pymbolic/primitives.py

pymbolic/sympy_interface.py

pymbolic/traits.py

pyproject.toml

test/test_pymbolic.py