build

Warn user about the working copy when configuring the author #12965

Job	Run time
build (ubuntu-latest)	1m 37s
Build jj-lib without Git support	42s
build (macos-14)	1m 59s
Check protos	27s
Check that MkDocs can build the docs	25s
Check formatting	15s
build (windows-latest)	4m 49s
build (ubuntu-latest, --all-features)	2m 34s
cargo-deny (advisories)	29s
cargo-deny (bans licenses sources)	21s
Clippy check	2m 14s
Check that MkDocs can build the docs with Poetry 1.8	21s
	16m 13s

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