build

Add Sphinx documentation #468

Job	Run time
Build sphinx documentation	15s
Build sphinx documentation on Windows	54s
ubuntu-latest Py 3.8 x64	20s
Build Python source .tar.gz	14s
ubuntu-latest Py 3.9 x64	42s
ubuntu-latest Py 3.10 x64	41s
ubuntu-latest Py 3.11 x64	42s
ubuntu-latest Py 3.12 x64	44s
ubuntu-latest Py pypy3.9 x64	31s
windows-latest Py 3.8 x86	54s
windows-latest Py 3.8 x64	1m 0s
windows-latest Py 3.9 x86	1m 45s
windows-latest Py 3.9 x64	1m 28s
windows-latest Py 3.10 x86	2m 33s
windows-latest Py 3.10 x64	2m 7s
windows-latest Py 3.11 x86	1m 54s
windows-latest Py 3.11 x64	2m 0s
windows-latest Py 3.12 x86	2m 24s
windows-latest Py 3.12 x64	1m 39s
windows-latest Py pypy3.9 x86	1m 37s
windows-latest Py pypy3.9 x64	1m 37s
macos-latest Py 3.11 x64	59s
macos-latest Py 3.12 x64	48s
macos-latest Py pypy3.9 x64	1m 17s
	29m 5s

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