## Summary
- synchronize the shell current working directory with Iris over the
existing IPC pipe
- use the synchronized directory for file, workspace, Git, and history
suggestions on macOS
- preserve the Linux `/proc/<pid>/cwd` and process-CWD fallbacks
- update zsh, bash, and fish integrations while preserving command exit
status
## Problem
On macOS, `/proc/<pid>/cwd` is unavailable, so `GetCWD` fell back to the
directory where Iris was launched, usually `$HOME`. After changing
directories in the shell, file suggestions could therefore continue to
come from `$HOME`.
## Tests
- `go test -race ./spec`
- `go test ./root -run ^'$'`
- `go test ./... -run ^'$'`
- generated zsh, bash, and fish hook syntax checks
Co-authored-by: Pavel Naumov <Pavel.Naumov@berekebank.kz>
Pavel NaumovandPavel Naumov
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