Implemented a UI-based Caesar Cipher tool in Python.
Features added:

• Complete Caesar Cipher encryption and decryption logic
• Customizable shift value input by the user
• Encode and decode gameplay modes
• Handles both uppercase and lowercase letters
• Non-alphabetic characters (spaces, punctuation) preserved as-is
• Emoji-based CLI interface
• Clear output display of the transformed text

Technical implementation includes:

• Python functions for modular cipher flow
• match-case statements for mode selection (encrypt/decrypt)
• Alphabet shifting using the ord() and chr() built-ins
• Separate handling for encryption and decryption logic
• Input validation for shift values and text
• Dynamic character transformation with wrap-around support

Testing completed for:

• Encryption with various shift values
• Decryption restoring original plaintext
• Wrap-around at end of alphabet (e.g. Z + 3 = C)
• Uppercase and lowercase character handling
• Preservation of spaces, digits, and special characters
• Multiple randomized input runs

The project was built using beginner-friendly Python concepts including:

• Lists
• Loops
• Functions
• Conditional statements
• match-case control flow
• String manipulation with ord() and chr()
• Basic input validation and user interaction

Closes #42