Add custom build backend for parallel NetCDF4 #401

Job	Run time
Build wheels for x86_64 on macos-15-intel	12m 43s
Build source distribution	35s
Build ubuntu-22.04 (x86_64) wheels	5m 51s
Build ubuntu-24.04-arm (aarch64) wheels	8m 20s
Build wheels for AMD64 on windows-latest	1m 43s
Build wheels for arm64 on macos-14	9m 26s
Build wheels for ARM64 on Windows	9m 30s
Publish to PyPI	0s
Show artifacts	0s
	48m 8s

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