Add manual section on invoking python with -Wd or -We #783

Job	Run time
Build source distribution	18s
Build macOS/x86 wheels (3.8)	10m 33s
Build and test Linux wheels (python3.8)	15m 37s
Build macOS/x86 wheels (3.9)	11m 49s
Build and test Linux wheels (python3.9)	16m 51s
Build macOS/x86 wheels (3.10)	9m 47s
Build and test Linux wheels (python3.10)	14m 22s
Build macOS/x86 wheels (3.11)	6m 44s
Build and test Linux wheels (python3.11)	10m 21s
Build package from source dist (3.8)	3m 30s
Build package from source dist (3.9)	6m 13s
Build package from source dist (3.10)	5m 43s
Build package from source dist (3.11)	3m 35s
Test macOS/x86 wheels (3.8)	30s
Test macOS/x86 wheels (3.9)	32s
Test macOS/x86 wheels (3.10)	44s
Test macOS/x86 wheels (3.11)	43s
Upload to PyPI	27s
	1h 58m 19s

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