🎨 Palette: Enhanced Welcome Experience & Shortcut Discoverability

[christopherfoxjr]

• 💡 What: Upgraded the kiba-welcome script to use a structured list for shortcuts and improved its internal logic. Added the Meta + D (Show Desktop) shortcut and updated Konsole to use the JetBrains Mono font.
• 🎯 Why: Improves discoverability of system shortcuts, provides a more professional "out-of-the-box" terminal experience, and makes the onboarding script more robust against UI changes.
• ♿ Accessibility: Improved the readability of the shortcuts guide by moving from a dense text block to a clear, icon-labeled list.

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PR created automatically by Jules for task 5205390241611183285 started by @christopherfoxjr

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[github-actions]

Automatically approved as it only affects build workflow files and is from a trusted contributor.