build

README: announce our docs website to the world + instructions to contribute #6840

Job	Run time
Check protos	47s
cargo-deny (advisories)	33s
cargo-deny (bans licenses sources)	32s
build (ubuntu-latest)	9m 54s
build (macos-13)	5m 11s
build (windows-latest)	12m 2s
build (ubuntu-latest, --all-features)	7m 22s
Clippy check	2m 54s
Check that MkDocs can build the docs	27s
Check formatting	18s
	40m 0s

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