Test

feat: add IndexTransform library for composable, lazy coordinate mappings #7175

Job	Run time
py=3.14-upstream	10m 38s
py=3.12-min_deps	19m 46s
os=macos-latest, py=3.12, deps=optional	9m 57s
os=macos-latest, py=3.14, deps=optional	5m 56s
doctests	55s
os=windows-latest, py=3.14, deps=optional	9m 13s
os=ubuntu-latest, py=3.14, deps=minimal	6m 5s
os=ubuntu-latest, py=3.13, deps=minimal	5m 56s
os=ubuntu-latest, py=3.14, deps=optional	7m 27s
os=ubuntu-latest, py=3.12, deps=optional	8m 40s
os=ubuntu-latest, py=3.12, deps=minimal	6m 24s
os=ubuntu-latest, py=3.13, deps=optional	7m 57s
os=windows-latest, py=3.12, deps=optional	10m 55s
Benchmark smoke test	9m 41s
Test complete	3s
	1h 59m 33s

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