Add typehints ciphers and bool alg (#3264)

* updating DIRECTORY.md

* updating DIRECTORY.md

* Fixed accidental commit of file I have't touched

* fixup! Format Python code with psf/black push

* updating DIRECTORY.md

* updating DIRECTORY.md

* Fixed some suggested coding style issues

* Update rsa_key_generator.py

* Update rsa_key_generator.py

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: John Law <johnlaw.po@gmail.com>

ciphers/morse_code_implementation.py

@@ -57,7 +57,7 @@ MORSE_CODE_DICT = {
 }
 
 
-def encrypt(message):
+def encrypt(message: str) -> str:
     cipher = ""
     for letter in message:
         if letter != " ":
@@ -69,7 +69,7 @@ def encrypt(message):
     return cipher[:-1]
 
 
-def decrypt(message):
+def decrypt(message: str) -> str:
     decipher = ""
     letters = message.split(" ")
     for letter in letters: