DOC: particlefile metadata #276

Job	Run time
mypy	3m 46s
py3.12 \| macos \| unit tests	15m 41s
py3.12 \| macos \| integration tests	12m 55s
py3.12 \| ubuntu \| unit tests	13m 23s
py3.12 \| ubuntu \| integration tests	18m 7s
py3.12 \| windows \| unit tests	22m 44s
py3.12 \| windows \| integration tests	31m 19s
py3.10 \| ubuntu \| unit tests	12m 42s
py3.11 \| ubuntu \| unit tests	12m 34s
merge-test-artifacts	0s
	2h 23m 11s

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