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

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Co-authored-by: John Law <johnlaw.po@gmail.com>