无法在 git worktree 项目运行 hooks 命令

[candy-Tong]

#465

[safishamsi]

Fixed in v0.4.32: _hooks_dir() now uses git rev-parse --path-format=absolute --git-path hooks instead of git config core.hooksPath. Git resolves this correctly for both normal repos and worktree checkouts, pointing to the shared hooks directory in the main repo's .git/hooks. Includes regression tests for install/uninstall from a worktree. Thanks to @candy-Tong for the PR analysis in #465.