build

Add templater support for rendering commit signatures #17338

Job	Run time
build (ubuntu-latest)	3m 39s
Build jj-lib without Git support	44s
build (macos-13)	3m 38s
build (macos-14)	3m 41s
build (windows-latest)	3m 21s
cargo-deny (advisories)	22s
build (ubuntu-latest, --all-features)	3m 28s
Check protos	31s
cargo-deny (bans licenses sources)	22s
Clippy check	2m 51s
Check that MkDocs can build the docs	8s
Check that MkDocs can build the docs with latest Python and uv	9s
Check formatting	16s
	23m 10s

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