bulk documentation updates for v0.9 #513

Job	Run time
build-docs (3.8)	3m 33s
build-jax (3.8)	1m 48s
build-numpy (3.8, short)	1m 46s
build-mpi (3.9)	6h 0m 13s
build-jax (3.9)	52s
build-numpy (3.8, optimize)	1m 45s
build-mpi (3.10)	1m 55s
build-jax (3.10)	51s
build-torch (3.8)	2m 7s
build-numpy (3.8, multivariate)	1m 27s
build-torch (3.9)	2m 9s
build-numpy (3.8, optimize-experimental)	2m 7s
build-torch (3.10)	2m 4s
build-numpy (3.9, short)	50s
build-numpy (3.9, optimize)	50s
build-numpy (3.9, multivariate)	49s
build-numpy (3.9, optimize-experimental)	48s
build-numpy (3.10, short)	51s
build-numpy (3.10, optimize)	48s
build-numpy (3.10, multivariate)	48s
build-numpy (3.10, optimize-experimental)	51s
	6h 29m 12s

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