Add JSON de/serialization to python #24

Job	Run time
Build wheel on ${{ matrix.platform.name }}	0s
linux (ubuntu-22.04, x86_64)	6m 25s
sdist	50s
macos (macos-14, aarch64, 3.11)	2m 23s
macos (macos-14, aarch64, 3.12)	1m 50s
macos (macos-14, aarch64, 3.13)	1m 48s
	13m 16s

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