🎨 Palette: Add encouraging empty state for new players

[EiJackGH]

💡 What: Added an explicit, encouraging string in the CLI displaying "None yet! Start clicking to set a record!" for users who have not yet established a high score, instead of simply omitting the Personal Best: line entirely.

🎯 Why: In CLI games (and UI generally), missing UI elements can leave users confused about system state. Providing an explicit empty state instead of hiding the component improves user onboarding by giving them a clear path forward.

📸 Before/After: Visual change in the CLI upon the very first launch.
Before:

==========================
      SPEED CLICKER
==========================
Controls:

After:

==========================
      SPEED CLICKER
==========================
 Personal Best: None yet! Start clicking to set a record!

Controls:

♿ Accessibility: Ensures that players starting their session from scratch aren't met with potentially confusing missing interface elements but have contextual clarity.

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PR created automatically by Jules for task 17778748581225222900 started by @EiJackGH

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