add `README.md` to interfaces (#179) #435

Job	Run time
build_linux (3.9)	2m 22s
build_linux (3.10)	2m 31s
build_linux (3.11)	2m 26s
build_linux (3.12)	2m 13s
build_windows (3.9)	21m 49s
build_windows (3.10)	9m 31s
build_windows (3.11)	9m 45s
build_windows (3.12)	9m 0s
test_linux (3.9, false, ubuntu-latest)	1m 44s
test_linux (3.10, false, ubuntu-latest)	1m 23s
test_linux (3.11, false, ubuntu-latest)	1m 43s
test_linux (3.12, false, ubuntu-latest)	1m 38s
test_windows (3.9, false, windows-2019)	7m 42s
test_windows (3.10, false, windows-2019)	3m 6s
test_windows (3.11, false, windows-2019)	3m 21s
test_windows (3.12, false, windows-2019)	4m 36s
	1h 24m 50s

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