build

restore: add --restore-descendants flag #70

Job	Run time
Check protos	24s
Build jj-lib without Git support	46s
build (ubuntu-latest)	4m 33s
cargo-deny (advisories)	24s
build (macos-13)	7m 8s
cargo-deny (bans licenses sources)	20s
build (macos-14)	5m 18s
Clippy check	2m 31s
Check that MkDocs can build the docs	21s
build (windows-latest)	10m 14s
Check that MkDocs can build the docs with Poetry 1.8	21s
build (ubuntu-latest, --all-features)	5m 22s
Check formatting	15s
	37m 57s

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