doc: use sphinx-autoapi for API reference #6695

Job	Run time
debug	1s
pick_server_suffix	1s
Build linux1 wheel	20s
Style Check	47s
retro 232	0s
retro 241	0s
retro 242	0s
retro 251	0s
retro 222	0s
retro 231	0s
examples	0s
docs	0s
PyDPF-Post	0s
Build and Test on Docker / Build and Test On Docker (3.9, ubuntu-latest)	26m 23s
tests_any / Setup	1s
Run examples on Docker / Setup	1s
tests / Setup	1s
upload-development-docs	0s
Run examples on Docker / Run Examples (3.9, ubuntu-latest)	22m 2s
tests / Tests (3.9, windows-latest)	21m 15s
tests / Tests (3.9, ubuntu-latest)	16m 52s
tests_any / Tests (3.9, windows-latest)	19m 51s
tests_any / Tests (3.9, ubuntu-latest)	13m 10s
	2h 0m 45s

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