feat: add support for generating JSON formatted substrait plan #31

Job	Run time
build / lint-toml	8s
build / generate-license	49s
build / lint-python	9s
build / lint-rust	25s
build / ManyLinux arm64	8m 36s
build / macOS arm64 & Windows (3.10, windows-latest)	9m 17s
build / macOS arm64 & Windows (3.10, macos-latest)	4m 26s
build / ManyLinux x86_64	13m 2s
build / Source distribution	-1s
build / build-macos-x86_64	-1s
build / Build docs	47s
build / Merge build artifacts	0s
test	0s
	37m 37s

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