build

cli: Refactor out `get_fetch_remotes` into git_util.rs #16577

Job	Run time
build (ubuntu-latest)	1m 37s
Build jj-lib without Git support	46s
build (macos-13)	2m 11s
build (macos-14)	1m 34s
Check protos	25s
cargo-deny (advisories)	23s
build (windows-latest)	3m 45s
cargo-deny (bans licenses sources)	22s
build (ubuntu-latest, --all-features)	2m 35s
Check that MkDocs can build the docs	9s
Check that MkDocs can build the docs with latest Python and uv	13s
Check formatting	19s
Clippy check	2m 14s
	16m 33s

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