Release v0.12.1

Editor Fallback - Robust Editor Selection with Automatic Recovery

Replaces dialoguer::Editor with the edit crate for editor handling. When $VISUAL or $EDITOR points to an uninstalled program (e.g., code --wait after removing VS Code), the editor now automatically falls back through a platform-specific list of known editors instead of crashing with "IO error: program not found".

Changed

Editor Selection Overhaul

Replaced dialoguer::Editor with edit crate for all editor operations (config edit and commit message editing)
Editor fallback chain: $VISUAL → $EDITOR → platform defaults (macOS: nano/vim/vi/emacs/open; Linux: sensible-editor/nano/vim/vi; Windows: notepad)
Each candidate is verified via which before attempting to launch
Removed editor feature from dialoguer dependency (still used for Select prompts)

Release Workflow

Release now creates a draft first, publishes only after all jobs succeed

Upgrade

bash

# Homebrew
brew upgrade gcop-rs

# Cargo
cargo install gcop-rs

# pip
pip install --upgrade gcop-rs