🕒 Add Digital Clock GUI Project using Python and Tkinter

📘 Overview

This PR introduces a new mini project — Digital Clock GUI, built using Python and Tkinter.
The application displays the current time in real-time (HH:MM:SS format) and updates automatically every second.
It also shows the current date for a complete and modern user experience.

🧩 Features Added

• Real-time digital clock display
• Automatic update every second using after()
• Displays current date using datetime
• Clean and minimal Tkinter-based interface
• Added detailed README.md with setup guide and learning notes

#214