feat(pyproject): add `N` (pep8 naming) rule to ruff config... #301

Job	Run time
Build wheels	1m 5s
client-generation	3m 15s
Unit test - ./extensions/gubbins/gubbins-core	1m 24s
Unit test - ./extensions/gubbins/gubbins-db	1m 34s
Unit test - ./extensions/gubbins/gubbins-routers	2m 0s
Unit test - ./extensions/gubbins/gubbins-client	1m 32s
Unit test - ./extensions/gubbins/gubbins-cli	1m 37s
build-image	2m 29s
pytest-integration	13m 29s
	28m 25s

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