git: Intercept signing prompt from GPG when committing (#34096)

Closes #30111 

- [x] basic implementation
- [x] implementation for remote projects
- [x] surface error output from GPG if signing fails
- [ ] ~~Windows~~

Release Notes:

- git: Passphrase prompts from GPG to unlock commit signing keys are now
shown in Zed.
842ac984d5Cole Miller committed on 7/11/2025, 12:38:51 AM· committed by GitHubparent87362c6
9 files changedLine totals unavailable