feat(bindings/python): cursor object for PEP 249 #934

Job	Run time
check	14s
build-x86_64-unknown-linux-gnu	1m 33s
build-aarch64-unknown-linux-gnu	1m 42s
build-x86_64-unknown-linux-musl	1m 41s
build-aarch64-unknown-linux-musl	1m 41s
build-x86_64-pc-windows-msvc	1m 33s
build-aarch64-pc-windows-msvc	1m 34s
build-x86_64-apple-darwin	1m 43s
build-aarch64-apple-darwin	1m 34s
integration-${{ matrix.ver }}	1s
publish	1s
	13m 17s

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