build

Update error message when no movement target is found. #13542

Job	Run time
build (ubuntu-latest)	4m 29s
Build jj-lib without Git support	41s
cargo-deny (advisories)	25s
build (macos-13)	7m 56s
Check protos	33s
build (macos-14)	3m 19s
cargo-deny (bans licenses sources)	25s
Clippy check	2m 26s
build (windows-latest)	8m 17s
build (ubuntu-latest, --all-features)	5m 29s
Check that MkDocs can build the docs with Poetry 1.8	19s
Check formatting	20s
Check that MkDocs can build the docs	29s
	35m 8s

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