build

windows: avoid UNC paths in `run_ui_editor` #12296

Job	Run time
build (ubuntu-latest)	4m 11s
build (macos-14)	3m 26s
build (windows-latest)	8m 22s
Build jj-lib without Git support	45s
build (ubuntu-latest, --all-features)	5m 2s
Check protos	31s
cargo-deny (advisories)	22s
cargo-deny (bans licenses sources)	26s
Clippy check	2m 25s
Check that MkDocs can build the docs	27s
Check that MkDocs can build the docs with Poetry 1.8	19s
Check formatting	17s
	26m 33s

Provide feedback