🎨 Palette: [UX improvement] Enhance CLI visuals and cross-platform exit behavior for NumberGuess

[EiJackGH]

What:

• Added ANSI color codes (GREEN, RED, CYAN, YELLOW) and <iomanip> to format the console output of the Number Guesser C++ game.
• Included emojis (🎮, 📈, 📉, 🎉, ⚠️) for better visual feedback.
• Restructured the "Zen Mode" Easter Egg into a clean, ASCII-art formatted box.
• Improved cross-platform compatibility by replacing the Windows-only system("pause") with standard C++ cin.ignore(10000, '\n'); cin.get();.

Why:

• The CLI experience was purely text-based and monotone, increasing cognitive load when scanning inputs and outputs.
• The system("pause") command prevented the game from running or exiting cleanly on Unix/macOS environments, causing poor developer UX.
• The visual polish (colors, emojis) provides immediate visual cues for success or failure states.

Accessibility:

• Adding colors and emojis enhances visual distinction, making it easier for users with visual fatigue or reading difficulties to quickly understand the game's feedback.

Changes:

• NumberGuess/NumberGuess.cpp

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PR created automatically by Jules for task 2909356023017170567 started by @EiJackGH

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