(feat): full v2 compat via python fallback #160

Job	Run time
build sdist	16s
build on linux (x86_64 - 2_28)	4m 19s
build on linux (aarch64 - 2_28)	4m 9s
build on macos (x86_64)	4m 15s
build on macos (aarch64)	4m 8s
build on windows (x86_64)	12m 23s
build on linux (armv7 - 2_28)	4m 22s
build on linux (ppc64le - 2_28)	4m 19s
build on linux (x86_64 - musllinux_1_2)	3m 57s
build on linux (aarch64 - musllinux_1_2)	4m 9s
build on linux (armv7 - musllinux_1_2)	4m 0s
build on windows (i686)	12m 47s
inspect	3s
version	0s
publish	0s
	1h 3m 7s

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