build

cli: add a `jj git init` command. #8854

Job	Run time
Check protos	24s
cargo-deny (advisories)	26s
build (ubuntu-latest)	4m 47s
cargo-deny (bans licenses sources)	28s
build (macos-14)	3m 20s
Clippy check	3m 8s
Check that MkDocs can build the docs	39s
Check that MkDocs can build the docs with Poetry 1.3.2	33s
build (windows-latest)	6m 50s
build (ubuntu-latest, --all-features)	5m 54s
Check formatting	14s
	26m 43s

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