API changes: `Field` and `FieldSet` #141

Job	Run time
mypy	3m 45s
py3.12 \| macos \| unit tests	9m 47s
py3.12 \| ubuntu \| unit tests	12m 39s
py3.12 \| macos \| integration tests	18m 49s
py3.12 \| windows \| unit tests	20m 21s
py3.12 \| ubuntu \| integration tests	18m 46s
py3.10 \| ubuntu \| unit tests	11m 58s
py3.12 \| windows \| integration tests	33m 4s
py3.11 \| ubuntu \| unit tests	12m 7s
merge-test-artifacts	2s
	2h 21m 18s

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