added pyi docstrings #209

Job	Run time
Check version	7s
test_py_macos (3.8)	1m 18s
test_py_windows (3.7)	3m 18s
test_py_macos (3.9)	46s
test_py_windows (3.8)	2m 0s
test_py_linux (3.7)	39s
test_py_macos (3.10)	58s
test_rust (ubuntu-latest)	52s
test_py_macos (3.11)	29s
test_py_linux (3.8)	54s
test_rust (macos-latest)	29s
test_py_linux (3.9)	53s
test_py_macos (3.12)	41s
test_py_windows (3.9)	2m 1s
test_rust (windows-latest)	52s
test_py_linux (3.10)	1m 10s
test_py_windows (3.10)	2m 27s
test_py_linux (3.11)	59s
test_py_windows (3.11)	2m 5s
test_py_linux (3.12)	38s
test_py_windows (3.12)	3m 18s
build_sdist	0s
build_windows	0s
build_linux	0s
build_macos	0s
Create release and publish to PyPI	0s
	26m 54s

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