Add check_sdist job to validate source wheels and fix nanobind submodule contents in source wheel (recursive clone option was missing). closes #485 #515

Job	Run time
debug_build_ok	4m 38s
Make source distribution	1m 42s
zenodo_json	5s
Check if todos are annotated	1m 46s
Check if source wheels are compilable	2m 40s
Build wheels on ubuntu-latest	20m 49s
Build wheels on windows-latest	43m 56s
Build wheels on macos-15	22m 27s
Build wheels on ubuntu-24.04-arm	18m 17s
Build wheels on macos-15-intel	45m 37s
dist_upload	7s
dist_check (ubuntu-latest)	22s
dist_check (ubuntu-24.04-arm)	29s
Run example notebooks on ubuntu-latest	25m 21s
Run example notebooks on macos-15	7m 46s
Run example notebooks on macos-15-intel	19m 19s
Run example notebooks on windows-latest	13m 6s
Run example notebooks on ubuntu-24.04-arm	10m 5s
	3h 58m 32s

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