DOC: particlefile metadata #275

Job	Run time
mypy	2m 24s
py3.12 \| macos \| unit tests	2m 28s
py3.12 \| macos \| integration tests	2m 18s
py3.12 \| ubuntu \| unit tests	2m 26s
py3.12 \| ubuntu \| integration tests	2m 15s
py3.12 \| windows \| unit tests	2m 8s
py3.12 \| windows \| integration tests	2m 9s
py3.10 \| ubuntu \| unit tests	2m 20s
py3.11 \| ubuntu \| unit tests	2m 19s
merge-test-artifacts	1s
	20m 48s

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