Add map functions #202

Job	Run time
build / lint-toml	8s
build / generate-license	51s
build / lint-python	9s
build / lint-rust	20s
build / check-crates-patch	0s
build / ManyLinux arm64	9m 17s
build / ManyLinux x86_64	14m 6s
build / macOS arm64 & Windows (3.10, windows-latest)	11m 14s
build / macOS arm64 & Windows (3.10, macos-latest)	6m 1s
build / build-macos-x86_64	0s
build / Source distribution	0s
build / Build docs	43s
build / Merge build artifacts	0s
test / test-matrix (3.14, stable)	4m 8s
test / test-matrix (3.12, stable)	3m 52s
test / test-matrix (3.11, stable)	3m 51s
test / test-matrix (3.13, stable)	4m 8s
test / test-matrix (3.10, stable)	4m 4s
	1h 2m 52s

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