build

windows: avoid UNC paths in `run_ui_editor` #12229

Job	Run time
build (ubuntu-latest)	4m 5s
Build jj-lib without Git support	1m 3s
build (macos-14)	3m 20s
Check protos	51s
Check that MkDocs can build the docs	27s
build (windows-latest)	8m 51s
build (ubuntu-latest, --all-features)	4m 58s
Check that MkDocs can build the docs with Poetry 1.8	23s
Check formatting	16s
cargo-deny (advisories)	27s
cargo-deny (bans licenses sources)	24s
Clippy check	2m 26s
	27m 31s

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