Adding ti index to the ravelled particle index too #615

Job	Run time
mypy	3m 31s
py3.13 \| macos \| integration tests	17m 15s
py3.13 \| macos \| unit tests	10m 5s
py3.13 \| ubuntu \| integration tests	25m 50s
py3.13 \| ubuntu \| unit tests	11m 55s
py3.13 \| windows \| integration tests	30m 17s
py3.13 \| windows \| unit tests	16m 1s
py3.10 \| ubuntu \| integration tests	18m 27s
py3.10 \| ubuntu \| unit tests	12m 47s
py3.11 \| ubuntu \| unit tests	12m 7s
py3.12 \| ubuntu \| unit tests	12m 27s
merge-test-artifacts	0s
	2h 50m 42s

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