Add check_sdist job to validate source wheels and fix nanobind submod… #516

Job	Run time
Check if todos are annotated	1m 46s
Make source distribution	1m 25s
zenodo_json	5s
debug_build_ok	4m 25s
Check if source wheels are compilable	2m 49s
Build wheels on ubuntu-latest	21m 59s
Build wheels on windows-latest	45m 5s
Build wheels on macos-15-intel	32m 35s
Build wheels on ubuntu-24.04-arm	18m 33s
Build wheels on macos-15	23m 17s
dist_upload	1m 9s
dist_check (ubuntu-24.04-arm)	35s
Run example notebooks on macos-15-intel	26m 51s
Run example notebooks on ubuntu-24.04-arm	10m 0s
dist_check (ubuntu-latest)	28s
Run example notebooks on macos-15	23m 42s
Run example notebooks on ubuntu-latest	10m 16s
Run example notebooks on windows-latest	12m 49s
	3h 57m 49s

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