fix(mypy): Fix annotations for 13 cipher algorithms (#4278)

* Initial fix for mypy errors in some cipher algorithms

* fix(mypy): Update type hints

* fix(mypy): Update type hints for enigma_machine2.py

* Update as per the suggestion

Co-authored-by: Christian Clauss <cclauss@me.com>

Co-authored-by: Christian Clauss <cclauss@me.com>

ciphers/brute_force_caesar_cipher.py

@@ -43,7 +43,7 @@ def decrypt(message: str) -> None:
         print(f"Decryption using Key #{key}: {translated}")
 
 
-def main():
+def main() -> None:
     message = input("Encrypted message: ")
     message = message.upper()
     decrypt(message)