build

Add separate stream item type with copy info #13528

Job	Run time
build (ubuntu-latest)	4m 26s
build (macos-13)	5m 46s
build (macos-14)	3m 18s
Build jj-lib without Git support	43s
build (windows-latest)	9m 5s
cargo-deny (advisories)	22s
build (ubuntu-latest, --all-features)	5m 24s
cargo-deny (bans licenses sources)	21s
Check protos	28s
Clippy check	2m 42s
Check that MkDocs can build the docs	20s
Check that MkDocs can build the docs with Poetry 1.8	22s
Check formatting	20s
	33m 37s

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