build

Update error message when no movement target is found. #13600

Job	Run time
build (ubuntu-latest)	4m 33s
Build jj-lib without Git support	45s
build (macos-13)	6m 21s
build (macos-14)	3m 54s
build (windows-latest)	9m 28s
cargo-deny (advisories)	24s
build (ubuntu-latest, --all-features)	5m 23s
cargo-deny (bans licenses sources)	23s
Check protos	26s
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	16s
	35m 17s

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