doc - OpenGrok cross reference for /external/ruy/doc/

Name		Date	Size	#Lines	LOC
..		-	-
README.md	D	23-Nov-2023	79	4	2
depgraph.sh	D	23-Nov-2023	3.3 KiB	154	136
depgraph.svg	D	23-Nov-2023	20 KiB	378	314

1# Ruy documentation
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3This directory will eventually contain ruy documentation.
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