Feature request: Customizable spinner/progress messages

Feature Request

Allow users to customize the spinner messages that appear while Claude Code is processing (e.g., "thinking...", "leavening...", "pondering...").

Proposed Solution

Add a spinnerMessages array to settings.json:

{
  "spinnerMessages": [
    "thinking...",
    "pondering...",
    "contemplating...",
    "brewing ideas..."
  ]
}

If not configured, fall back to the default messages.

Why

• Personalization makes tools feel more enjoyable to use
• Teams could add inside jokes or team-specific humor
• Low implementation complexity, high quality-of-life payoff
• The status line is already customizable - extending this to spinner messages feels natural

Small feature, big personality. Let people have fun with their tools.