🤖 Set build config via Sphinx ext #6112

Job	Run time
nox / Run nox static session	12s
nox / Run nox formatters_check session	11s
nox / Run nox typing session	24s
nox / Run nox spelling session	10s
nox / Run nox checkers(rstcheck) session	30s
nox / Run nox checkers(docs-build) session	1m 41s
nox / Run nox actionlint session	10s
nox / Run nox pip-compile session	24s
check	2s
	3m 44s

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