build

README: announce our docs website to the world + instructions to contribute #6837

Job	Run time
Check protos	45s
cargo-deny (advisories)	30s
cargo-deny (bans licenses sources)	30s
build (ubuntu-latest)	8m 47s
build (macos-13)	4m 47s
build (windows-latest)	10m 56s
build (ubuntu-latest, --all-features)	9m 9s
Check that MkDocs can build the docs	38s
Check formatting	20s
Clippy check	2m 54s
	39m 16s

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