🎨 Palette: Enhance NumberGuess CLI with ANSI colors and cross-platform exit

[EiJackGH]

💡 What:
Added ANSI color codes (GREEN, RED, YELLOW, CYAN, MAGENTA) and emojis to the Number Guesser C++ CLI application. Replaced the Windows-specific system("pause") call with a standard C++ cin.ignore(10000, '\n'); cin.get(); implementation.

🎯 Why:
The original terminal output was plain text, making it harder to quickly parse game states (success, errors, higher/lower hints). Adding visual hierarchy through box-drawing borders and colored text significantly improves the player experience. Replacing system("pause") ensures the game can be compiled and run on Linux/macOS seamlessly while retaining the desired behavior of keeping the terminal window open upon completion.

♿ Accessibility:

• Added high-contrast color coding to error messages (Red) vs. success (Green).
• Accompanied all colored text states with unique emojis (📈, 📉, ❌, 🎉) so that color-blind users can still distinguish feedback visually.
• Replaced a system command with standard input handling, ensuring more deterministic keyboard interactions across operating systems.

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PR created automatically by Jules for task 11012189501186729076 started by @EiJackGH

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