• reports progress, warnings and prompts to deew-gui and deew-web for
  their new GUI output (the terminal output doesn't change)
• default config: new [gui] section for deew-gui and deew-web
• deew-gui 0.3.0 and deew-web 0.3.0:
  • new GUI output next to the CLI output, switched with the CLI | GUI
    toggle next to Run/Stop: progress bars per file, warnings and errors
    listed under them, prompts as pop-ups, the CLI output stays available
    below
  • the choice is saved in the new [gui] section of the config
    (progress = 'cli' or 'native', default 'cli')