ncrypt (proof of concept)

MD5-CRYPT, SHA256-CRYPT and SHA512-CRYPT for Node.js.

Todo :

• Implementation reference for sha256-crypt and sha512-crypt: https://akkadia.org/drepper/SHA-crypt.txt
• Implementation reference for md5-crypt: https://passlib.readthedocs.io/en/stable/lib/passlib.hash.md5_crypt.html#algorithm
• API documention
• Optimizations and benchmarking