- Add config-based shell override to fix incorrect $SHELL detection
  (fixes fish/custom shell issues) - Add --select-only (-s) flag to
  output path for shell integration - Implement proper color support
  when outputting to stderr - Refactor duplicate shell detection code
  into getShell() function - Update onboarding to include optional shell
  configuration - Migrate config from plain text to JSON format
  (backward compatible) - Document shell integration with examples for
  bash/zsh/fish

  This allows users to either: 1. Use default subprocess mode for
  isolated experiments 2. Use select-only mode with `cd $(try -s)` for
  current shell navigation