chore: configure isort to use black profile

isort --check-only failed on 6 files because the project had no isort
configuration and its default style conflicts with black/ruff-format.
With profile = "black" all formatters agree; no source changes needed.

pyproject.toml

@@ -55,3 +55,6 @@ warn_unused_configs = true
 [[tool.mypy.overrides]]
 module = ["odf.*", "redminelib.*", "tabulate", "openpyxl.*", "yaml", "requests", "urllib3.*"]
 ignore_missing_imports = true
+
+[tool.isort]
+profile = "black"