build

revset: add at_operation(op, expression) #14841

Job	Run time
Check protos	1m 3s
Check formatting	17s
Build jj-lib without Git support	46s
build (ubuntu-latest)	4m 49s
cargo-deny (advisories)	24s
build (macos-13)	9m 49s
cargo-deny (bans licenses sources)	28s
build (macos-14)	3m 34s
build (windows-latest)	10m 20s
build (ubuntu-latest, --all-features)	5m 37s
Clippy check	2m 36s
Check that MkDocs can build the docs	22s
Check that MkDocs can build the docs with Poetry 1.8	22s
	40m 27s

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