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/diffie.py

@@ -1,4 +1,4 @@
-def find_primitive(n):
+def find_primitive(n: int) -> int:
     for r in range(1, n):
         li = []
         for x in range(n - 1):