build

EXPERIMENT: build jujutsu with buck2 #13622

Job	Run time
build (ubuntu-latest)	4m 34s
build (macos-13)	7m 49s
build (macos-14)	3m 53s
Build jj-lib without Git support	43s
Check formatting	13s
Check protos	54s
build (windows-latest)	9m 28s
build (ubuntu-latest, --all-features)	5m 29s
cargo-deny (advisories)	24s
Clippy check	2m 39s
cargo-deny (bans licenses sources)	23s
Check that MkDocs can build the docs	23s
Check that MkDocs can build the docs with Poetry 1.8	23s
	37m 15s

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