build

cli: add `jj operation show` and `jj operation diff` commands #12419

Job	Run time
build (ubuntu-latest)	4m 17s
Check protos	36s
build (macos-14)	3m 7s
Build jj-lib without Git support	40s
build (windows-latest)	7m 32s
cargo-deny (advisories)	25s
build (ubuntu-latest, --all-features)	5m 18s
Clippy check	2m 26s
cargo-deny (bans licenses sources)	35s
Check that MkDocs can build the docs	21s
Check that MkDocs can build the docs with Poetry 1.8	20s
Check formatting	21s
	25m 58s

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