Add #936 ASCII Art Generator

[supriya-cybertech]

📌 What does this project do?

A terminal-based ASCII Art Generator that converts any text input
into large decorative block letters using # symbols.

✨ Features

• Supports all A–Z letters and spaces
• Clean 5-row block letter rendering for each character
• Handles unsupported characters gracefully
• Simple interactive loop with quit option

🖥️ How to Run

python ascii_art_generator.py

✅ Checklist

• Code is under 100 lines
• README.md is included
• Script runs without errors
• No external libraries used (only built-in Python)