Test

define a module for chunk grids, and a registry #6318

Job	Run time
doctests	55s
py=3.13-upstream	23m 1s
py=3.11-min_deps	18m 30s
os=ubuntu-latest, py=3.11, deps=minimal	14m 20s
os=ubuntu-latest, py=3.12, deps=minimal	16m 10s
os=ubuntu-latest, py=3.11, deps=optional	18m 6s
os=ubuntu-latest, py=3.13, deps=optional	15m 30s
os=ubuntu-latest, py=3.12, deps=optional	17m 17s
os=ubuntu-latest, py=3.13, deps=minimal	14m 38s
os=windows-latest, py=3.13, deps=optional	21m 58s
os=macos-latest, py=3.11, deps=optional	11m 43s
os=windows-latest, py=3.11, deps=optional	23m 11s
os=macos-latest, py=3.13, deps=optional	9m 33s
Test complete	4s
	3h 24m 56s

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