add subprojects for each MPY version #1

Job	Run time
Build source distribution	20s
Build wheels on windows-11-arm	4m 9s
Build wheels on ubuntu-22.04	2m 22s
Build wheels on windows-latest	4m 13s
Build wheels on ubuntu-24.04-arm	2m 40s
Build wheels on macos-latest	1m 40s
upload_pypi	-1s
	15m 23s

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