completion: teach absorb and bookmark move about revisions #16847

Job	Run time
cargo-deny (advisories)	31s
Build jj-lib without Git support	48s
cargo-deny (bans licenses sources)	29s
build (ubuntu-latest)	5m 25s
Check protos	25s
build (macos-13)	6m 47s
Check that MkDocs can build the docs	14s
build (macos-14)	4m 55s
Check that MkDocs can build the docs with latest Python and uv	10s
Check formatting	16s
build (windows-latest)	9m 6s
build (ubuntu-latest, --all-features)	6m 11s
Clippy check	2m 35s
	37m 52s

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