pub fn default_cache_path() -> PathBufExpand description
default_cache_path — see implementation.
All zshrs state lives under $ZSHRS_HOME (default ~/.zshrs),
matching the daemon’s CachePaths convention (daemon/paths.rs)
and the ~/.zinit/~/.zpwr/~/.oh-my-zsh precedent. Project
policy forbids ~/.cache/zshrs/ and ~/Library/Caches/zshrs/
— both of which dirs::cache_dir() resolves to.