Support conversion to pbtxt in command line interface #4134

Job	Run time
Build source distribution	27s
determine-arm64-runner	1s
Build wheels for cp311-manylinux_x86_64	7m 9s
Build wheels for cp311-macosx_x86_64	8m 40s
Build wheels for cp311-macosx_arm64	5m 28s
Build wheels for cp311-win_amd64	8m 17s
Build wheels for cp310-manylinux_aarch64	4m 18s
Pass testing build wheels	3s
build_docker	4m 29s
build_pypi_index	11s
upload_pypi	0s
deploy_pypi_index	0s
	39m 3s

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