Adding cypher buster script

[Harshit28j]

Added Cipher buster script
This PR resolves #1679

Description

Caesar Cipher Decryption: The script decrypts a ciphertext encrypted using the Caesar Cipher. It prompts the user to enter the ciphertext and provides an option to enter the known shift value used in the encryption. If the shift value is unknown, the script automatically tries all possible shift values (1 to 25) and displays the decrypted plaintext for each potential shift value.

• Transposition Cipher Decryption: The script decrypts a ciphertext encrypted using the Transposition Cipher. It prompts the user to enter the ciphertext and provides an option to enter the known key used in the encryption. If the key is unknown, the script automatically tries all possible key values (1 to 25) and displays the decrypted plaintext for each potential key value.

• User Interface: The script provides a user-friendly command-line interface. It prompts the user to select the encryption method they want to decrypt (1 for Caesar Cipher, 2 for Transposition Cipher) and input the corresponding ciphertext. The user can also choose to provide the known shift value or key, or leave it blank to try all possible combinations.

I request you to mark this contribution under GSSOC'23

Checklist:

• I have performed a self-review of my own code
• I have created a helpful and easy to understand README.md

Category:

• Cryptography

Title: Cypher Buster
Folder: cypher_buster
Script: cipher_buster.py

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