Add `OrientModifier::rotation` #494

Job	Run time
Check format	41s
Coverage	4m 18s
build (2d, stable, windows-latest)	6m 50s
run-examples	10m 11s
build (2d, stable, ubuntu-latest)	9m 42s
build (2d, stable, macos-latest)	3m 21s
build (3d, stable, windows-latest)	5m 32s
build (3d, stable, ubuntu-latest)	10m 13s
build (3d, stable, macos-latest)	3m 8s
build (all, stable, windows-latest)	5m 30s
build (all, stable, ubuntu-latest)	6m 43s
build (all, stable, macos-latest)	2m 28s
	1h 8m 37s

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