Install Parcels in RTD #610

Job	Run time
mypy	3m 37s
py3.13 \| macos \| integration tests	12m 29s
py3.13 \| macos \| unit tests	9m 40s
py3.13 \| ubuntu \| integration tests	13m 59s
py3.13 \| windows \| integration tests	24m 30s
py3.13 \| ubuntu \| unit tests	10m 28s
py3.10 \| ubuntu \| integration tests	13m 55s
py3.13 \| windows \| unit tests	12m 51s
py3.10 \| ubuntu \| unit tests	11m 37s
py3.11 \| ubuntu \| unit tests	10m 52s
py3.12 \| ubuntu \| unit tests	11m 5s
merge-test-artifacts	5s
	2h 15m 8s

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